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Lexus GS 300/GS 430



  • wwestwwest Posts: 10,706
    If the sharp low beam cutoff bothers you then you can disassemble the projector and drill a series of tiny holes in the shading "aperture" progressively farther and farther apart, or larger to smaller, much like the dotted sun shading you often find at the top of a windshield.

    Then you will have a more "soft" progression at the upward edge of the low beams and still not unduly interfere with oncoming driver's vision.
  • lawaiilawaii Posts: 7
    Thanks for the input --- for possible future use, (1) is the "shading aperture" shown anywhere on the Web, (2)does it take a special drill bit, and (3) what size bit would you recommend to make the "tiny" holes?

    I've had my new GS350 for a couple of weeks now. As described earlier by umalum, there is a very distinct cutoff, but the area covered seems much brighter and wider than the similar area covered by my BMW-530i and my wife's ES-300. So far, the low-beam lights have not been a problem for me except when approaching the beginning of a sharply inclined road. Until the front wheels get on that incline, I can't see anything that's even a few yards up the incline.

    I am really enjoying the car except for one thing. All of the dealers in this area (San Diego) order only GS350s with the optional 18" low-profile tires. It would take about four months to order a car from the factory with the standard 17" tires. The tires make my car very noisy on concrete freeways and, in certain areas, cause my car to go into the dreaded "freeway hop" --- I'll be looking for a solution to that problem sometime in the future.
  • hemsley1hemsley1 Posts: 21
    I am interested in the GS300, but I have a couple questions that maybe you guys can help me with. First, i do not like interiors of cars that have that "cockpit" feel (almost all the pontiacs have it). Does this car feel like that.

    Second, my brother has an 2004 ls430 and it is perfect for me, as far as the roominess is concerned. Does the interior in the front seats feel about as roomy as that, or does it seem substantially smaller?

    Anu insight is greatly appreciated. Thanks!
  • bdkinnhbdkinnh Posts: 292
    It sounds like the GS isn't a good bet for you. The cabin does feel a bit like a cockpit, and the space is a bit tight.

    The best thing to do is stop by a dealer and try it on for size yourself.
  • jodiek2jodiek2 Posts: 1
    Is it correct that a Lexus GS300 uses only premium gas? I was told you could use a medium grade gas.
  • bdkinnhbdkinnh Posts: 292
    You can use regular (manual even says so), but it is a false economy; the engine will self-adjust, and your gas milage could actually go down.

    Buying a GS and using regular is like buying a $20 cigar and then complaining about the price of matches.
  • wwestwwest Posts: 10,706
    But will the FE decrease enough to "burn" the cost savings of purchasing regular vs preminum?

    If you're not of a teeny-bopper boy-racer mentality, not often asking maximum HP of the engine, 87 octane will put you ahead of the other guy money wise.
  • bdkinnhbdkinnh Posts: 292
    You'd spend this much on a car, and then try to pinch pennies at the pump? Hey, it's your car, do whatever you want... but you may want to read this.
  • wwestwwest Posts: 10,706
    Sorry, the information at that link, Cecil Adams, is not so much wrong as it is incomplete.

    Running regular fuel in a HIGH compression engine designed for premium is a lot like running a TOO LEAN mixture in a low compression engine designed for regular fuel. Timing could be perfect, absolutely optimal, but the lean mixture would still oftentimes result in compression knock.

    Back in the days of carburation the only option would have been to change the jets in the carb to get a richer mixture.

    NO MORE...!

    These days if the engine controlling ECU detects TDC(compression) knock/ping and the ignition is already optimized the ECU will simply enrich the mixture to alleviate the knock/ping.

    Obviously this will also work with a high compression engine designed for high octane but presently fueled with low octane.

    So the question becomes....

    Will the use of the richer mixture to overcome knock/ping overcome the economic advantage gained by purchasing the cheaper low octane fuel?


    Provided you are not of the teeny-bopper boy-racer mentality and therefore are often in the WOT parametric realm. Absent a FULL charge, or nearly so, in the cylinders there will be no issue of TDC compression knocking.

    Which brings us nicely to the subject missed in the link.

    Knock/ping due to engine lugging.

    This is when the "back-load" on the piston is so high it cannot travel downward as fast as the flame front is expanding. Obviously any fuel, of any octane level can and will be subject to this and just as obviously ignition timing will play no part in this issue.


    Lower octane fuel (think diesel) contains more energy and therefore burns more "explosively", more rapidly advancing flame front, and therein lies the problem.

    Most modern day passenger vehicles have automatic transmissions so the controlling ECU executes a downshift if knock/ping is encountered in the parametric "region".

    With a manual/stick shift the only option, regardless of fuel octane in use, is to enrich the mixture slightly until the driver gets the "message".
  • wwestwwest Posts: 10,706
    Why fuel a low compression engine designed to use regular fuel with premium?

    I would normally NEVER recommend this, but....

    Premium fuel has a lower energy level and therefore a slower advancing flamefront once ignited. That will allow a leaner WOT A/F mixture and still not incur compression knocking and lower the probability of incuring knock due to engine lugging.

    The above is dependent on the engine ECU continually "pushing" the parametric envelope and therefore "learning" of new effective parameters.

    Again, obviously, absent the "boy-racer" mentality....
  • Hi all,

    I am interested in getting a used GS300 or GS400. My budget is $10K-$13K and my research shows that this could get me a GS300 or GS400 from 1998-2000 with 50K-140K miles. My questions are:

    1) Any differences in the years 1998, 1999 or 2000 in terms of reliability or features?
    2) Is 140K too many miles for a car like this?
    3) Would you go GS300 or 400?

    Thanks in advance
  • wwestwwest Posts: 10,706
    GS300, hands down...
  • wwestwwest Posts: 10,706
    Just personal choice/opinion.
  • Take it in. I had the same problem, tilt button slid the roof and if you kept any of the buttons pressed it would cycle open and closed, wouldn't seal shut. The auto open and close did not work either. Dealer replaced controls, now ok.
  • I am looking to buy a used GS and am looking for input on whether the 300 is adequate. I have test driven a 2007 430 and liked it but was not blown away by it. I found the road noise quite noticeable (I guess that's a function of the 18' wheels) and the power very good but not crazy.

    I am not looking for a hot rod type car - I like decent power but don't really need a V8 430. Just for ref. I drive a 99 Passat GLX V6 and find it under powered.

    Looking for input from those who have driven both the 300 and 430. Is there a big difference? Also, what's the reliability of this car? I am sick of all the problems with my VW Passat and can't get rid of it fast enough! Plus the VW dealerships are absolute sleaze bags!
  • Hello,
    I am wondering what people who own the lexus gs300 or gs430 pay usually per month, not including gas in maintaining the car. i.e. trips to the shop, oil changes, fluid changes, repairs, other problems?

    i spoke to someone on the BMW forum and they said for their 5 series its around 150 dollars a month. I can't imagine that kind of income going out on a monthly basis on an already very expensive car.

    any thoughts on what people pay estimated on a monthly basis on their gs300 or 430's?

    (just to be clear, i am talking about the previous generation gs models, not the new one's. like 2005 and earlier).
  • madmatt1madmatt1 Posts: 1
    Guys pls tell me the dealer is not full of ******...chk engine light on 2 wks after dealer did plugs, timing belt, water pump and throttle body cleaning. My gs400 now running like a champ and fast as the day I bought it(used w/ 70K miles on it).
    Dealer says chk engine light code was "gas leak" but they dug deeper and found that the gas overflow bladder/tank which holds charcoal to evaporate overflow gas then sends the fumes to engine to get burned has a stuck-open valve risking sending charcoal bits into the engine.
    Anyone w/ experience w/ this?
  • kalakala Posts: 9
    This morning, the powersteering on my 2006 GS300 with just 4000 miles gave out. Good thing I was still at home and wasn't on the road yet. II'll be towing the car to my Lexus dealer soon. Has anyone else had this problem?

    From the time I first bought the car, when first driving off in the morning, I hear a squeak/squeal coming from the front end when turning the steering wheel. The sound goes away after a short while. The dealer told me the cause was a light coat of rust that forms on the brakes overnight. But I told them twice that I'm not stepping on the brakes. They said the brakes are still touch the discs slightly even when not stepping on them. I'm thinking that maybe that squeak is related to my powersteering problem?

    Also has there been any recalls on the 2006 GS300s yet?
  • msr2kmsr2k Posts: 2
    Can 2006 G3 300 play MP3 (CDs with a bunch of MP3 files)?
    I am thinking of getting a used GS and I would like it to have MP3 capability.
  • amf1932amf1932 Posts: 79
    Sorry, the answer is NO! :)
  • go_mdx1go_mdx1 Posts: 135
    Hi Folks,

    Considering a 2006 GS300. My driving is around 60% highway and 40% city. My 04 TL gets a combined 24 mpg. I'm hoping the GS300 will do even better - getting around 27 mpg.

    Is this realistic?
    does the GS 300 require premium fuel?
  • wwestwwest Posts: 10,706
    "Is this realistic?"


    27 hwy only...maybe.
  • lawaiilawaii Posts: 7
    My 2007 GS350 gets 29mpg on the freeway doing 70-80mph but only 17-18mpg in town and on residential streets.
  • acura10acura10 Posts: 1
    my '06 300 gs awd is getting a bit OVER 30 highway, if I accelerate gently and smoothly and use cruise at 65 as much as possible.

    worst case stop and go around town is like 21.
    Right now in a 70/30 mix of highway / city driving I'm doing 26.7 according to the trip computer. this is all with the A/C on almost all the time.

    remarkably good for a 3700 lb awd luxury car that goes 0-60 in under 7 seconds.
  • - Hows the factory Lexus Navigation System, is it worth it?

    - I read somewhere that you can play "DVD movies" on it's navigation screen on 02' and later models. Is that true, and if so does it work fine?

    - Is it possible to replace the factory "CD changer" with the "CD/MP3/DVD Audio/Video" setup that comes on the current Lexus models?

  • gouldngouldn Posts: 223

    I made a big mistake and stopped by a Lexus dealer on the way home from work, and a 2004 GS430 caught my eye. Before long I had test driven the 04 gs430 and also an 05 gs300.

    I was surprised at how easy, and yet still fun these big cars were to drive. They felt light on their feet despite their hefty weight, and I was really stunned by the comfort.

    I like the idea of a certified <40K example to take advantage of the 3 year 100K warranty, and it seems to me that the 300 and 430 are not far apart in price. The 05 GS300 with about 32K was offered at $26K, and a 04 430 with about 45K was offered for 25K. Both had nav/mlev.

    My driving impressions were a bit surprising. I _almost_ felt that the 300 was a tad faster... maybe it was the gearing, maybe just a fresher example, but certainly I did not feel a gigantic difference like I expected between the 300 and 430. Both were very nice, and my research so far shows that the MPG is almost the same.

    What do you think, should I go for a 300 or a 430? I'll be trading in an 05 Accord v6 coupe. Also, what kind of deals could I expect on a 04-05 GS (either 430 or 300), with Nav and the MLEV stereo? Are people getting them for under 25k?
  • wwestwwest Posts: 10,706
    With gas at $4/plus you'll undoubtedly get a "better" deal on the V8, in the short term.....

    Personally if I were in the market for a GS I would go for the later GS350 that has the V6 with DFI. 12:1 compression ratio yeilds better FE and more HP/torque over the GS300.
  • betterdealbetterdeal Posts: 1
    Remember save your money, do not get Lexus Nav system. Save $3000 for your next vacatio. Put in a $250.00 Garmin it is 10 times better and have fun on your vacation!!!!!!!!!!!
  • amf1932amf1932 Posts: 79
    I completely disagree! I have used the Lexus NAV system in my last two Lexus's ('03 ES300, '07 ES350). I also own the lastest Garmin GPS units. The Garmin's are excellent, but not nearly as sophisticated as the built in units in my Lexus cars. I can't go into a point by point reason I say this, but I will definitely buy my new Lexus cars with built in NAV units!!!
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