Jeep Liberty Diesel

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Comments

  • bmartinpebmartinpe Member Posts: 51
    Hey gang:

    I started my libby yesterday, and had to stop the engine after leaving the driveway because I forgot something in the house. On restarting the engine, it experienced a lack of power and ran rough. Idle speed was even rougher, and the engine seemed to be ready to stall out.

    I stopped the engine, restarted, and the issue has not returned. There were no trouble lights, just a libby that didn't want to go until I restarted, or should I say rebooted.

    For the record, 05-05 build, about 21-22 mpg, on my third egr (2nd replacement), and to my knowledge no TSBs have been done.

    Any ideas on the rough performance?
  • corndogcorndog Member Posts: 8
    Posted before about our liberty 2006 diesel cutting out. I realize several of you are complaining about your jeep doing this and calling it shuddering at 55 to 60 mph. which is what mine is doing. Dealer cannot fix this problem he says basically Chrysler doesn't care either. I have 8,000 miles on jeep it has done this since we got it new in Jan. Now blower motor burned up. Have also had trouble with Goodyear tires it takes nothing to punture tires and then they are unrepairable have three tires do this already and no we don't drive anywhere we haven't driven with our other two vehicles. Also seats stain easily and are hard to clean. We are now to the point we are going to talk to our lawyer about the lemon laws because we are tired of getting the you need to talk to this person because we can't help you speech. Chrysler has lost a valuable customer we always bought from them now we are wondering which car we will get next to replace this heap jeep. We only get 21 mpg. Really disappointing since we traded in a car that got much better mileage. It would be nice if chrysler read some of these complains to see its just more than one person stating the same problem is happening to alot of jeeps. But then if you won't stand behind your product why would you care what people said about your company. :mad: :lemon: :mad:
  • goodcrdgoodcrd Member Posts: 253
    I think these CRD's have a bosh fuel injection system, which are notorious for injector pump timing fault errors. When this fault occurres, what you discribed is exactly what happens. I wouldn't worry about this one incident unless it starts to happen frequently. Like more then once every two months. I've found this due to air in the fuel or fuel temperature too low for whatever reason. Once the air comes out of the fuel or fuel temp is up then everything goes back to normal. But you have to shut down the engine to reset the system. If you take your CRD in for service they can access an event history to see when this happened and how many times plus how long each event lasted. Good Luck.
  • nescosmonescosmo Member Posts: 453
    Bmartinpe... My crd was build the same date and I had the same problem. I think that it was air on the fuel lines also my dealer change my egr valve and he said that it was stock open.
  • bvcrdbvcrd Member Posts: 196
    It's true. No need for Da Vinci. One passage says two by two. A few lines later, it says two if not clean, and 6 or seven if clean. Can't remember exactly. What, Moses can't make up his mind? Two authors! YEP!
  • ohiojeepohiojeep Member Posts: 5
    My '05 CRD with 17k miles just displayed engine codes 110,410,299. I assume this means its time for EGR replacement, my first. I am apprehensive about the dealer working on it, the last time I talked to them they had never seen a CRD before. I haven't been following the TSBs. Did my own oil changes. Any advice before I go to the dealer?
  • faroutfarout Member Posts: 1,609
    eebro: Because I was the person that started this oily hose thing, you make a perfect reason for why it is a "real mess." But what can cure this, any idea. My dealer is putting on a new hose on Thursday. Also on Tues. the engine started a jerkiness at about 58 mph. There is a small drop in power and mpg went down to just 20. So I blew it our as we have all talked about before. I hope this is not a egr thing. Maybe the clamps are bad? This is the only problem in 13,300 miles, so I am eager to find out what my dealer says.
    My dealer said star told him the hose "SHOULD NOT HAVE ANY OIL ON IT ON THE OUTSIDE." If others have oil on the outside maybe it's recall time? Let you know.

    Farout
  • faroutfarout Member Posts: 1,609
    ohiojeep:PRAY! Pray that the Service manager is in a super mood. Pray that the Tec knows what he is doing. Pray for the parts to be there at the dealership. Finally pray for patients your self. That's the best I can offer.

    Farout
  • budsjpbudsjp Member Posts: 25
    Here's the end (I hope) of the story: Scanner revealed POO91 and P0093 - replaced fuel pressure regulator (08-27-29-01)and sensor (08-14-18-01). Removed #3 injector and tightened loose fitting on injector. Also discovered loose clamp on heater hose (it was nearly disconnected!) and repaired. Tech loves the car and wants one himself (to replace an F-250 Ford) but said his opinion is that they rushed these vehicles through the assembly line to get them to market and quality suffered greatly - no surprise to most of us who have had to deal with poor fittings, etc.
  • goodcrdgoodcrd Member Posts: 253
    When I bought my CRD 4/05 it was losing coolant also. I found the two heater hose clamps behind the surge tank not released. You could pull the hoses right off. I removed the coolant surge tank myself and properly attached the heater hoses. I've just noticed a power steering leak. I will repair it myself if it is simple. If it requires parts the dealer will do it. I don't let anyone work on my vehicles if I don't have to. Also noted on my 24000 mile oil change was that the rear pinion seal and engine rear main seals are wet/leaking. I checked the fluid level in the rear plus the vent and everything looked fine. I'm not losing any engine oil so I will be keeping an eye on this.
    I will be calling the dealer for an appointment so they can look at the engine and rear leaks. I do want these defects noted. I have been using ULSD the last week and I'm not getting any smoke. I used to get smoke after cruising at 55 mph for more then 20 minutes then moderate acceleration when passing someone. This is not happening with the ULSD. I can't smoke screen anyone with this stuff :( . The soot from the LSD and regular diesel fuel I believe is effecting the engine performance through the egr valve. I have noticed no hesitation and better response in engine performance between 45 to 55 mph range using the ULSD. The trans seems to shift less. And someone asked where I got my ULSD. I got it through my bother who works for an fuel distributor. It should start to show up at retail pumps over the next few months. Right now the fleet operators are buying it in bulk. Mass transit systems and municipalities, etc. I think there is light at the end of the tunnel and it is not a train. Good Luck.
  • nescosmonescosmo Member Posts: 453
    If I install 15 inch rims and tires would the crd drive in a higher rpm or gear. Would the higher rpm give me a better mileage. Can the 545 and the crd withstand the revolution.
  • stucoltsstucolts Member Posts: 15
    Codes 110,410,299--- 110-Intake air temperature Sensor 1 Circuit, 410- Secondary Air Injection System, 299- Turbo/Super Charger Under Boost. Sounds like you find that Circuit Sensor You will solve your problem.
  • goodcrdgoodcrd Member Posts: 253
    Check all your hoses associated with your air intake from your turbo to the intake manifold. Also spray your Air charge cooler down with and soapy water solution and look for air leaking out noted by bubbles. It sounds like your leaking boost pressure.
  • steve05steve05 Member Posts: 52
    bvcrd: Yes - 6/23/05 - I found a sticker under the rear drivers' side seat with date and the time - 21:49, surely the time the sticker was printed. This would pertain to a sequencing operation and not necessarily when the seat was installed, however with just-in-time stock delivery systems at the big three, I'm gonna guess my jeep was built third shift that night or first shift on the 24th. Could someone remind me of the 800 number to complain? I still have no owners manual and its about 75 miles to the dealer where I bought it. Tomorrow I call the new car manager and basically chew some unsuspecting suit out over a salesman who was really nice when I was there, but can't seem to be reached now. Got my money, too !@#$%^ busy now to mail me an owners manual. :mad:
  • twocycle2twocycle2 Member Posts: 55
    Tech loves the car and wants one himself (to replace an F-250 Ford) but said his opinion is that they rushed these vehicles through the assembly line to get them to market and quality suffered greatly - no surprise to most of us who have had to deal with poor fittings, etc.

    Question for everyone.....my understanding is that these vehicles have been made here and sold in Europe for years...obviously, some modifications were made for sale in the USA, but it is basically the same vehicle using basically the same engine. In fact, on the VM Motori sight, there is a news brief showing the delivery of the 500,000 engine to DCX from VM Motori....if that is the case, what is different about the American CRD's that is causing so many people to have so many problems? The egr valves and the transmissions seem to be where most of the problems are.....are these parts unique to the American versions in the Liberty? But isn't this the same tranny used behind the Hemi in other vehicles, and I haven't heard of those tranny's having these problems??? Can anybody shed any light on this???
    Twocycle2
  • faroutfarout Member Posts: 1,609
    twocycle2: I am not 100% sure, but here are some possible reasons. Perhaps the Europe CRD's have the 4 speed auto? The egr valve was not on the ones in Europe, or maybe a different kind? One thing is for sure is their diesel fuel is a better quality. They have well trained diesel tec's. DCX has many dealers that do not even sell the the CRD, and some who have sold a few CRD's have never seen one back for service. DCX does not have a pilot to see what's going on with the CRD when on the road. Diesel is less expensive than gasoline in Europe.
    The 500,000 engines were at different stages of emission laws when produced.
    To me it appears that DCX used us for a test market. We have paid a high price to be involved with their test on how people would respond to a diesel in a Jeep. I highly resent not being fully informed that they would only use the V M Motori diesel for only two years. I think DCX knew that this engine would not pass the US emission laws and they would have to put a different engine in the Liberty at some latter date. I wonder if some consumer laws were ignored. With that said I am still pleased with the CRD, and I hope the engine holds up until I have it paid for. Would I do the same thing, of trading our 2005 Liberty Limited in on the CRD Sport? If I knew that gas prices were going to be this much lower than diesel, I doubt I would have even considered it. I expected at least 24 mpg, and that diesel would be at least what gas would be. However there still may be a time in the near future that this might all change. I can't see truckers continuing to pay such high prices for diesel and not revolt in a national way of some kind. Where we live gas is 11 to 19 cents cheaper. Some places gas is $2.589 to $2.649 and diesel is $2.759 to $2.859. I do not know how this is to other areas. Hope this sheds some at least dim light on my thoughts.

    Farout
  • caribou1caribou1 Member Posts: 1,354
    Last friday I saw the new Liberty exposed in a local fair.
    It has the same equipment you have in the States. I wasn't able to take a look underneath at all of it's different features because the salesman was chasing me away. It has the throttle sensor mounted directly on the pedal, the water cooled electrically controlled egr and the air mass flowmeter I don't have. I will try to collect local information on issues if any.
    One thing that came up recently is a study of the second hand market for recent cars. People are not buying the fully 'computerised' cars second hand because of the extravagant cost of repair/exchange. This is new and may induce a significant change of attitude. Even Toyota is on the black list with their common rails in the UK. :(
  • bmartinpebmartinpe Member Posts: 51
    The key to better fuel economy is to lower the rpm. Use a larger wheel diameter if clearance will allow. (The Limited models come with a 17 inch rim.) I have heard through this forum that Jeep dealers can reprogram the speedometer to compensate for the tire diameter for about $30.
  • alljeepalljeep Member Posts: 35
    The egr valves and the transmissions seem to be where most of the problems are.....are these parts unique to the American versions in the Liberty? But isn't this the same tranny used behind the Hemi in other vehicles, and I haven't heard of those tranny's having these problems???

    The current EGR system/design is new to the American market.

    This transmission, specifically torque converter, may not be up to the task of the low RPM torque. The HEMI is only producing about 100 ft-lbs of torque at 1800rpm, and max torque is at a much higher RPM and for much shorter times.

    The CRD produces nearly 300 fl-lbs of torque at 1800 RPM, and it's in that range for the majority of it's operation when at speed. This is the difference that may be eating up the torque converters of the 545RFE transmission that is also used in the HEMIs.
  • winter2winter2 Member Posts: 1,801
    I would love to have ULSD in my CRD right now. Unfortunately, it is not available in MD, at least that I am aware of.

    The EGR issue and the smoke in the exhaust are related to the poor quality of the fuel and the high sulfur content. The sulfur and it's by-products are corrosive under the right conditions and will destroy the EGR valve and damage or destroy anything else it touches.

    I would suggest that you continue with the ULSD. For those of us that cannot find it yet, use a good fuel additive and cetane improver. Also, use an oil that is CI-4+ rated. This will help the EGR valve survive longer. Manufacturers of large diesel engines with EGR valve, liquid cooled or not, are recommending the use of CI-4+ rated oils.

    Look at the specs of the oil, especially the vaporization rate (Noack or ASTM D-5800). Mobil 1 has vaporization rates in the 13 - 15 % range which is pretty high. Shell Rotella is around 10%, while Amsoil 15W-40 and RedLine products are around 6%. I bring up this point because this oil vapor adds to the work the EGR valve must do and it makes a mess of the CCV system and the intake system.
  • caribou1caribou1 Member Posts: 1,354
    Look at what I've found:
    http://fsunw3.ferris.edu/~millerm/Chrysler Automatic Transmission.pdf
    It is quoted that the new KJ will have the 42RLE instead of the 545RFE.
    This is the one I have already... :shades: , and it's perfect.
    Could you possibly check on the vehicles that have transmission problems if there is a correlation?
    You can see the type of transmission you have by reading the sticker from underneath the driver's door.
    What I don't understand is that the first number gives the number of gear changes, and mine has 5 gears and starts with a 4 :confuse:
  • bvcrdbvcrd Member Posts: 196
    I finally heard back from the Shell Rotella people the other day, and they said they didn't test for it's vaporization. Probably just a polite way of telling me to freak off.
  • winter2winter2 Member Posts: 1,801
    I spoke with one of their techs, and they do test for vaporization. He would not give me exact numbers but gave me a ballpark figure to play with.
  • mike6206mike6206 Member Posts: 35
    Looking at the vaporization rate of the oil one uses and what it can do to the EGR, does the 13-15% range do better or the lower rates? Also, what part of MD do you live in? I live in PA, but about 2 miles from the MD-PA line and so far, the place I fuel at above Grantsville, MD hasn't gotten started with the USLD yet, but is selling a fuel additive called Howe's Lubricator that sounds like it will help with the USLD lubricating problem.
  • winter2winter2 Member Posts: 1,801
    There are a few notable differences here. EU (European Union) diesel fuel is totally different from what is presently available here domestically. First, it is ULSD with only 30 - 50 ppm of sulfur. Secondly, the cetane rating is or has to be at least 51 while domestically, cetane is only 40 or a bit better. Next, they use a different EGR valve (per Caribou1).

    The trans is the same but in Europe where diesels are more common, they drive them differently than we do here. We treat them like gas engines and we are use to winding the dickens out of our gassers to get any kind of power. With this or any turbo diesel, you do not need much right foot. Gentle is the word and use your tachometer. It is a valuable device. The max torque of this diesel comes on quickly and at fairly low RPM. Apply this too quickly and too frequently and you will kill any automatic trans. Yes, this trans goes on the back of a hemi, but as mentioned elsewhere, the torque curve for the hemi is different and it comes at higher RPM. Also the amount of torque for this diesel is very high over a wider band (at lower RPM) than for the hemi and that adds additional stress.
  • winter2winter2 Member Posts: 1,801
    Mike,

    A lower vaporization rate is generally better. Oils like those from Mobil 1 have been severely hydrotreated and tend to come apart more easily than oils that have been given less hydro treatment or none at all. There are several classes of synthetic oils from I to IV. The first class has had little or no hydro treatment and as the number/class increases, there is more hydro treatment. With lower vaporization rates, there are fewer breakdown products to coat the interior of the engine with varnish or sludge. The other benefit is that the CCV system and the aftercooler stay cleaner much longer. With less junk in the intake and in the charge, the exhaust gases are themselves cleaner putting less stress on exhaust components such as the EGR valve.

    As to where I live, I am in Montgomery County and as far I know, ULSD is not being sold here yet.

    As to the fuel additive, if you are driving a CRD, you will probably not need it as they are designed to run on ULSD. That additive would be more appropriate in older diesel injection systems (not common rail but rotary pump).
  • caribou1caribou1 Member Posts: 1,354
    Just a rectification:
    The newer CRD has the same egr valve you have. Mine is too old to be sophisticated...
    My engine controller just asks the solenoid valve to open the vacuum line to the egr actuator when there is no load, and to close it when the load comes back. There is no feedback of the egr position on my truck, so this makes my life better.
    The transmission I have in my 2003 model is apparently the next transmission you will be getting. This could well explain part of the shudder saga.
  • winter2winter2 Member Posts: 1,801
    Is the trans in your CRD a four speed or five speed automatic?
  • unclebubbaunclebubba Member Posts: 80
    I know, "not another post on mpg!!!" Short and sweet as I can. I take it up to around 58 mph (where it goes into OD) gently bring it to 55 mph and set cruise control. It goes along @ 1625 rpm and mpg goes up to a consistent 30.2 mpg (according to overhead console). Usual drive ran around 25.4 mpg at 60 mph and 1750 rpm. Coming up on 15,000 miles (6,000 miles after re-designed EGR and re-flash of computer) :)
  • bvcrdbvcrd Member Posts: 196
    5 speed.
  • elecautoelecauto Member Posts: 2
    Hi, I need the fuel injection wiring diagram for the next Jeep:
    Make: Jeep
    model: Liberty
    year: 2001
    engine: VM, 2.8L CRD turbo diesel

    If anyone can help me, please let me know.

    Regards :confuse:
  • bvcrdbvcrd Member Posts: 196
    What are you trying to do? Here in the USA, there were no 2.8L CRDs in anything older than a 2005. Wasn't 2002 the first year of production?
  • indianrefiningindianrefining Member Posts: 102
    There was no Liberty diesel sold in the States in '01, and I don't believe that there was a 2.8 litre version of the VM Motori CRD built until '05. :confuse:
  • bvcrdbvcrd Member Posts: 196
    Like I said. I believe there was a 2.5 available on the other side of the pond.
  • elecautoelecauto Member Posts: 2
    Hi, thanks for your answers.
    This Liberty wasn`t sold in the US, it was sold in Costa Rica, Central America.

    The problem I have is black smoke always, and when I tried to scan, there wasn`t communication.

    So I want to check the wiring and sensors` signals.

    The ECU part number is:
    0 281 010 291
    P56041700BA

    Thanks
  • faroutfarout Member Posts: 1,609
    caribou1: Today I took my CRD in to the dealer to get the inter cooler hose replaced. The new hose has the protective plastic like netting all the way from top to bottom. At the ends there is a rubber sleeve about 2 1/2 inches long that holds the plastic netting in place, and instead of the factory pressure clamps they now put on the stainless steel screw type of clamps. This is much better as far as appearing to be a heavy duty hose set up. The tec said they have not had any hoses that were soaked with oil before at this dealership, but there has been a signifacient number nation wide. I was told this is not right as it causes pressure to be lost. While talking to STAR the tec did some check while STAR did some check with their computer. The MAP Sensor is not working correctly. I was told this would cause shifts to be higher than they should be, and fuel mpg would be off.
    I also found out why DCX is making this oil weight such an issue. There have been a number of engines when starting because of heavy weight oil have destroyed parts because of slow flowing oil. My oil was tested, and it is 50% and is acceptable for it's lubercating value. The tec said to stay with 0-40W. There has been a number of CRD's with cracked cyclender. sleeves, and water in the oil.
    The tec also informed that the buying public response to the diesel is not near what DCX has expected, and this was a major loss. They were told not to look for a diesel in the Liberty type of vehicle, until the next big change in the model. There is a strong chance of a 3.8 L or 4.L perhaps in 2007, with the 5 speed automatic transmission.
    The Compass is now able to be ordered for delivery in late May or early June. The Patriot won't be here until Fall. The Cvt with its belts are something that the tec said everyone is anxious to see how they do in the future.
    Caribou1, what weight oil do you use in your CRD? And is the weight of oil the same in Europe as here in the US?

    Farout
  • faroutfarout Member Posts: 1,609
    bmartinpe: That is true, it cost me $32. and took less than 15 min. They go by the circumfrance of the tire.

    Farout
  • faroutfarout Member Posts: 1,609
    alljeep: I am wondering if there is a relationship to the Egr problem with using BIO fuel higher than B-5, and thicker oil above 5-40W. Has anyone using high Bio fuel or high weight oil had any problems. If so or not how many miles on the CRD?

    Farout
  • nescosmonescosmo Member Posts: 453
    I own a 3500 sprinter diesel van and the tranny that I have is the same as the jeep commander (I think is commander), but if has a =and + on the tranny to lower the shifting of the tranny, it work good why the crd don't have it. On 07 the fuel will change for the ulsd and also the oil will change there will be no more cl-4+ it will have another classification to work with the low sulfur fuel is going to be that way because the emission control.
  • nescosmonescosmo Member Posts: 453
    Farout... I bought my crd with 60 miles and all the clamp that it came with were the screw type my was built 05-05. also there are 2 sensors on each side of the radiator what are they and were is the map sensor.
  • twocycle2twocycle2 Member Posts: 55
    The tec also informed that the buying public response to the diesel is not near what DCX has expected, and this was a major loss. They were told not to look for a diesel in the Liberty type of vehicle, until the next big change in the model.

    First, thank you to everyone who responded to my questions about the differences between the American version and the European versions....the info was very informative.

    Farout, as to the quote above from the tech, does this sound accurate to you? My understanding was that the original plan in 05 was to build 5000, but that demand was so large they increased production to over 8000. As for 06's, the dealers in DFW couldn't keep them....they'd come in and be gone within a week or two. In fact, it's hard to find any dealers that have any left at all at this point. The Limiteds seemed to sell quicker than the Sports....the only models I ever saw discounted were a few Sports from early 05, and by looking at them, it was because of their color/equipment that they didn't sell. Personally, I think the engine DCX chose to test on us is a bit crude....with all the European diesel offerings, an engine as refined as the VW TDI might have made the CRD a real hit. I come from a background of diesels, and I appreciate how advanced our engine actually is....unfortunately, to the average consumer, many people probably test drove it and found it to be "too noisy" for daily use. Especially when you can get in a VW and hardly tell a diesel from a gas......just my thoughts.....

    I'm like you....I hope the engine lasts, and that DCX supports the engine with parts at least until I can trade it in, if that's what it comes to.....I hope it holds up, though....it's still one of my favorite vehicles I've owned. It's a blast driving around in a vehicle I love that nobody else has!!!!
    Twocycle2
  • jkinzeljkinzel Member Posts: 735
    Farout, as to the quote above from the tech, does this sound accurate to you? My understanding was that the original plan in 05 was to build 5000, but that demand was so large they increased production to over 8000. As for 06's, the dealers in DFW couldn't keep them....they'd come in and be gone within a week or two. In fact, it's hard to find any dealers that have any left at all at this point.

    Twocycle2, Two of the dealers in the Seattle, Tacoma area told me the Liberty CRD’s would sell in spurts, but fast. I just did a inventory check of the regional dealers and found 11 CRD’s on lots. 8 Limited and 3 Sport. I have yet to see any CRD’s on the road, but lots of VW TDI’s on the road.

    I have been told by the finance minister, no new car until 2008. :cry:
  • siberiasiberia Member Posts: 520
    Farout, the description you give of your new hose and clamps exactly describes what came on my March 05 build. One of the 2 1/2 in sleeves came apart and fell off before the first oil change. Good luck with your new hose.
  • siberiasiberia Member Posts: 520
    This is a wild guess, Nescosmo. The two sensors, one on each side of the radiator that are attached to painted body structure, might be collision sensors for the air bags.
  • tidestertidester Member Posts: 10,059
    I have been told by the finance minister ...

    The best advice I can give you is to NEVER argue with the finance minister on domestic spending issues! :)

    tidester, host
  • jkinzeljkinzel Member Posts: 735
    The best advice I can give you is to NEVER argue with the finance minister on domestic spending issues!

    Yes tidester, I learned along time ago not to argue. My midlife crisis is to buy a VW Jetta TDI, so I’ll just have to chew on my bottom lip until the Fall of 2007. :sick:
  • kevin27kevin27 Member Posts: 2
    Hi. I'm new to the forum but have been an avid reader as I am considering buying a Liberty CRD. I just want to make a comment about the hydrotreating of oil. I'm a PhD chemist and at one time worked in a pilot plant that produced research samples of base lube oils for Valvoline.

    Actually, oil that has been "heavily hydrotreated" should be less apt to break down. The first purpose of the hydrotreating is to remove sulfur by converting it into hydrogen sulfide (H2S, rotten egg smell, very toxic) which comes off as a gas. The second purpose is to remove residual unsaturation from the molecules. Any double bonds (the unsaturation) present are prone to oxidation (the reason "used" oil is dark brown or black) and polymerization (leads to the sludge). Hydrotreating a lot actually should be a good thing, but the process is slow and doing it for longer adds cost. Hydrotreating may also remove some of the aromatics (benzene-like compounds). It's hard to have a consistent viscosity profile if aromatics are present. Usually, they try to remove these before hydrotreating--more of problem with conventional motor oils than for synthetics.

    All oil manufacturers test the vaporization rate. As you guys suspect, there is a specification for it. They do something called a "simulated distillation" using a gas chromatograph (GC) (if you don't know what this is, just watch CSI and they like to show them off). From the 30 minute GC experiment, they basically know how much oil will have boiled off at a given temperature. I vaguely remember a spec. for conventional oil (from '98, when I was a co-op) being no more than 7% boil off at 700 or 800 degrees F. Because engines don't run at these temperatures, it would seem that boil off should be slow, but it mysteriously goes somewhere.

    I hope this was at least moderately insightful.
  • steverstever Guest Posts: 52,454
    Now the $64 question - knowing what you know about oil, do you run synthetic in your passenger cars?

    Steve, Host
  • tidestertidester Member Posts: 10,059
    Welcome aboard, Kevin! And thanks for the lowdown.

    I'm sure someone has already thought of it but I wonder whether processing with high intensity ultrasound (implying high pressure and temperature) to remove the sulfur and break those double bonds would be feasible, quicker or cheaper?

    You may enjoy the Engine Oil - A slippery subject Part 2 discussion.

    tidester, host
  • bvcrdbvcrd Member Posts: 196
    Probable answer, Does a vegetarian eat lettuce?
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