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GM - has a lot of issues to work out, and if I were them...I would come out with a statement on what their plans are if they don't want to lose full size market share.!
You can clean your injectors but after that, it is hard to gain enough economy from a tank of fuel to cover the cost of the additive.
Bottom line...If you want excellent fuel economy buy a little hybrid car. If you want a big ole chevy truck for work- pay at the pump.
I gotta go...my truck is running.
i've certainly noticed smoother TDI operation & startup in winter when I use the winter/whitebottle poweservice but i didn't bother with it even during subzero temps last winter.
haven't any of the diesel/truck mags done tests with the new duramaxen on the track at 65 mph with modded software / disabled fuel-wasting "regeneration" ? wouldn't it be an easy test? well, easy for me to say!
At first the mileage sucked then after about 10000 miles things began to improve.
To date I have gotten as high as 22 on the highway (I-70) doing the speedlimit of 75-65. Never gets above 2000 rpm at 75 mph except when accelerating.
I have had really bad fuel performance with a head wind. I have gotten as little as 11 MPG with a 15-20K load. This last trip though I had at least 15000 on and got 18 MPG after upgrading to 265 10 ply tires and having the dealership install the new ECU updates. I had to keep track of fuel consumption after switching to the 265 tires as the dealership will not update the module for me for the new tire size.
The jake brake works awesome. The thing tows like there is no tomorrow and runs like a sports car, rides like a Cadillac as well.......I bought a Diablo chip and the jury is still out as I found that the guys didn't install the chip correctly. Air bags are a must for big loads.....I wonder just how much it would tow as I have had some loads on it and it just keeps going whether sea level or mountains......
I did find that a new fuel filter at 50% fuel filter life.....cleaning the K&N air filter at the same interval, and changing the oil at 30% life remaining, 3000 miles, or 100hours (whichever comes first) also helps. Long trips go better at night and I'm hoping this last trip with a load is an indicator of future fuel mileage performance.
There are several of these truck for sale out there, you just have to look for them...and the people selling them are anxious to make deals, that's if you need tow anything heavier than 16.5K.
I figure that I keep this truck for several years ans then see what GM and or Ford have to offer. Ford will by that time have their act together with the F450 ...they'll have their own engine in the truck and maybe GM is they're still around will put out a production model of 4500 truck in off the line HD pickup.
One thing that I had in my Silverado that I would recommend is a K&N air filter, it will add 10-12 HP, and as you know your will get better MPG with more HP, and colder air. It's pricey but it's the last you will have to buy!
http://www.oilsandlube.com/dieseloil21.htm
Based on what this says...I'm willing to give it try after I ask to see if it would void any warranties.
"Chevrolet Duramax Diesel Owners
Learn about AMSOIL synthetic motor oil from experienced Diesel Truck Engineers and Lubrication Specialists right here in the auto and truck engineering and manufacturing capital of the world- Detroit, Michigan.
We are diesel engine, powertrain and chassis experts and are here to help you achieve optimum performance and longevity from your truck.
You've spent your hard earned money on the Duramax Diesel option in one of the most popular and well engineered trucks there is, now don't you think you owe it to yourself to use the very best oil in it? And don't let your local dealership service center tell you that you you have to use their brand of oil to "maintain your warranty". That is a false statement by the dealership, yet it goes on day in and day out. We constantly receive calls from customers that were told this by their servicing dealership. This practice is not authorized or condoned by the auto manufacturers, but the fact is it still goes on.
How a servicing dealership can essentially tell a customer that they have to use a lower quality oil than AMSOIL to "maintain their warranty" is not only wrong but it is also illegal unless they provide it free of charge. There are Federal laws that protect you against this. Please read our Warranty Laws You Need to Know section of this website to learn more or send us an email.
Take a look at the varnish deposits in this picture below. These are the results of a severe high temperature deposit test. The one at the far right is AMSOIL Synthetic 15W-40 Diesel oil and the others are major brand petroleum diesel oils. (left to right: Chevron Delo 400, Cummins Premium Blue, Shell Rotella T, AMSOIL 15W-40). The test clearly shows that AMSOIL keeps engines cleaner longer than other major brand diesel oils do. Which oil would you rather have protecting your engine?"
Plenty of power, always did even with the first really bad injector. A few other niggling complaints of sticky steering when first started and turning out of a parking space and that damn rattle from the steering shaft even after they replaced it.
Jim
I live in rural high desert Arizona with longer trips with less traffic than many city dewellers, but with plenty of big hills. Never seen some of these amazing mpg figures that get posted on the internet.
Extended warrantys are good, I extended the factory one and will extend it again next year if the option is still available especially as my truck has only just over 52,000 miles on it.
Monitored this used cooking oil fuel with a bunch of friends who ran bus conversions and many dumped the system because it was so labor intensive. Forget to swqtch over to regular fuel before shutting off the engine for the day just once and you had a bunch of cleaning out before you were on the road unless you were really lucky. Fuel has to be heated to keep it flowing properly, etc, what a pain.
I could see using used cooking oil if you drove all day and night but for day to day, what a pain it can be.
I had bad smoke and a really stinky exhaust. After two trips to the dealer, they had replaced 3 injectors, the fuel pump and goodness knows what else and it seems good now (touch wood!!!). But I still don't know what the problem was as they appeared to change parts until the problem was cured. They did say the faulty fuel pump pressure had damaged the injectors.
Great truck, just love it, but it goes away when the warranty runs out...... LOL.