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Lexus RX 300



  • jeffmust2jeffmust2 Posts: 811
    That would be, let's see...your 5th Lexus?

    Darn those dealers!!
  • ravlravl Posts: 129
    Thanks for the feedback, Avery. Maybe you're the one that made me think to try this? I guess the next question is which source do I believe more, the speedo or onboard computer?
  • wwestwwest Posts: 10,706
    Dealer gets 5 in April but since I don't want the nav or the sunroof I'll likely have to wait.

    Dealers: Hey, you have to buy the car somewhere, the secret is to never darken their door for anything but vehicle purchases or absolute necessities, like shop manuals.

    Bought my 01 C4 over the internet, Greenlight, have never even met, been at, the dealership. Salesman, Daniel Brunty, was a nice enough person over the phone.

    Looking ahead to the RX180/e that will be an even dozen.
  • wwestwwest Posts: 10,706
    The speedo is a "real time" indication, use it for that. The OBC computes and displays an average, use IT for that.
  • avery1avery1 Posts: 373
    If I put the speedometer as accurately as possible on 70 and zero out the trip computer, go for 150 miles on flat I5 and have the trip computer read 67mph it just makes me wonder which is accurate. Obviously not critical to have the computer super accurate but it raises the question.
  • Just getting ready to post this when I saw ravl's message above. I (finally!) replaced the Integrities on my 2001 RX with Bridgestone Dueler H/Ls. Haven't taken them on the highway yet (where the Goodyears drifted all over the road), so I'll hold off on any performance comparisons. But the gas mileage (at least what's reported by the trip computer) looks to be about 2 MPG less with the Bridgestones. I hadn't considered the possibility of different tires throwing off the computer. If not that, could it be simply that the Goodyears get better gas mileage? (That might explain why Lexus kept putting sub-$50 tires on a $35K+ vehicle.)
  • wwestwwest Posts: 10,706
    Might be a simple "rounding", or even truncation, matter in the computation of average MPH. That OBC isn't a P4, possibly even an 8 bitter.

    Or the programmer might have been thinking forward to the day that a WSP (Washington State Patrol) wanted to look over your "shoulder".
  • uis00snuis00sn Posts: 18
    Does anybody know how to reset AvMilesGallon on display? I''s stuck on 16mpg and there is nothing in the manual about it.

    Thanks a lot, YG.
  • jiaminjiamin Posts: 556
    My 00 RX manual says on page 44 that { to calculate from the beginning, push the "INFO" button for more than 1 second. }
  • I haven't checked on tire weights but I'd suspect that ANY of the common replacement tires for the Badyears would be heavier than the Zerotegritys. A greater rotational mass would require more power to accelerate (and brake, for that matter, which is why one should look at upgrading brakes when going to significantly bigger wheels and tires) and would adversely effect mileage.

    I think it's a worthwhile tradeoff, though.
  • My book, 99 RX, also says to press and hold the Info button. You can do this on Average MPH as well. I have never reset my AMG, over 4 years now, and its steady at 20.5 MPG. I went 3+ Years with the Goodyears, and switched to Duellers almost a year ago. Noticed a little bit improvement. I think the big thing with tires on an RX is to keep the pressures in the correct range. Handling and gas mileage all improve.
  • gsenthilgsenthil Posts: 154
    I was on cruise at 65mph indicated by the speedometer; reset the Avg MPG and the display was at 63.2. I am inclined to think the OBC is more accurate- anyone have opinions otherwise?
  • wwestwwest Posts: 10,706
    Personally I would believe the RX300 engineers/designers would spend a lot more time and effort making the speedometer accurate (as shipped)and have little concern about giving the programmers a good solid "spec" for an accurate average MPG estimate.

    Try dividing 10 by 3 on an 8 bit processor and see where you MUST compromise by rounding or truncation
  • tidestertidester Posts: 10,059
    Try dividing 10 by 3 on an 8 bit processor and see where you MUST compromise by rounding or truncation

    Memory isn't that precious in the 21st century that 32 bit arithmetic operations can't be programmed into them. 8-bit processors were used to calculate pi to 100's of thousands of decimal places. ANSI FORTH, used to program many embedded devices, can easily handle 6 or 8 digits of accuracy.

    tidester, host
  • jeffmust2jeffmust2 Posts: 811
    had Michelin rubber.

    Thought you might want to know the factory's revised thinking.

    Actually, just about every crossover SUV at the shows (Infiniti FX45/35, Nissan Murano, etc.) had Michelin.
  • wwestwwest Posts: 10,706
    Yes, memory is cheap. But you forgot to bring up the issue of programmer time and the KISS principle.

    If I wanted an accurate readout of speed, or average speed as a derivative, I would start by being absolutely sure the tires were always properly inflated, even cold vs hot.

    The factory, not being able to assure those parameters with certainty, has no reason to attempt to provide "high" accuracy with an input "sensor" that has "normal" variations of 5% and absent operator attention as much as 10 to 20%

    You can't provide or compute an accurate measurement from a sensor, tire circumference, that of itself isn't "accurate".

    So don't waste the programmer's time.

    I have beaten a few speeding tickets by asking the officer, in court, what his tire pressures were when he verified the accuracy of his speedometer vs when he clocked me.

    Damn radar anyway.
  • kente2kente2 Posts: 12
    Is the general thinking we will have to wait until we can test drive the new rx330 to determine if the new rx330 has the same transmission hesitation problems as the es300?

    This makes the remaining rx300's look pretty good, but my wife wants the latest and greatest!

    Any thoughts.
  • wwestwwest Posts: 10,706
    As in cruising along and then suddenly going WOT?

    The MY2000 GS300 I had seemed to take a moment to "think" about just exactly what to do next when I did that.

    I my opinion it's likely due to the engine ECU needing the time to retune/reset the engine parameters for balls-out WOT performance.

    Manufacturers seem to be going the extra mile to achieve the best MPG and of course that conflicts with getting the highest HP at WOT.

    SO when you "floor it" maybe it isn't transmission "hesitation" at all, but the engine ecu taking the time to adjust the intake plenum resonance and the VVTI valve opening/closing timing and duration.
  • tidestertidester Posts: 10,059
    But you forgot to bring up the issue of programmer time and the KISS principle.

    Oh, right! It might increase the total cost by $100 or so - pretty serious addition to cost of develping the vehicle! LoL!

    tidester, host
  • rmd122rmd122 Posts: 21
    My dealer wants $850 for the 60K service. They use their own service list which is more than the owner's manual. It includes a new V belt and plugs. The owner's manual lists plug change at 120K.

    Does this sound reasonable or am I beiing gouged?
  • you probably know, it's not the cars that the dealers make the money on, it's the maintenance. IMHO, I would definitely stick to the owner's manual recommendations for 60K maintenance, NOT what the dealer thinks is needed. You know your car better than anyone else, if you think it needs new plugs, then get them. Otherwise, stick to the manual.

    On the same subject, can someone tell me how much they paid for their 15K service? I'm bringing mine in tomorrow, asking them to do what's in the service booklet, not "their" version.

  • wwestwwest Posts: 10,706
    Don't ask, TELL!

    Have the service writer write into the work order that you only want service done that is recommended by the non-rough service schedule in the service manual. And I think most manual directs that the major service is at 90k miles.

    Programmer time. Averaged over this many vehicles the additional cost (excluding the need to use the unloaded fifth wheel to get the additional accuracy) might be as little as $00.01.

    But this is where micro-managing sets in, the person paying the programmer can only control costs at his/her level.

    And in this case I certainly don't disagree with that, if the accuracy isn't there to begin with, you can't "write" it in.
  • steverstever Posts: 52,683
    The Edmunds Maintenance Guide will estimate what we think your service should cost.

    Steve, Host

  • I did check out the Edmunds Maintenance Guide. In my area, the 15K is estimated at $148.00. That's a lot better than what my friend paid for his 15K...close to $600.00!

    I'll definitely let them know what I WANT completed on my car.

    Thanks again!
  • ncvolncvol Posts: 196
    Is the RX330 replacing the RX300, or is Lexus going to sell both?
  • mrrogersmrrogers Posts: 391
    None of us have driven a 2004 RX330 yet, but I wonder if a person kept the transmission shift lever in "3" for city driving and speeds under 45 mph, and then shifted to "4-O" for highway driving and speeds above 45 mph if the transmission problems would be minimized? I do that in my current company car (2001 Buick Regal), and I believe the transmission does less searching for gears at that ackward 44 - 46 mph range. I understand that the Buick is a four speed, and not a five speed, but I wonder if the principle is the same.
          Concerning the decision about a new 2003 RX300 Vs a new 2004 RX330, I certainly agree with your wife that the 04 will be the latest and greatest in terms of being something new and different. A lot depends on what you are looking for. Mrs. Rogers and I only have a twelve pound miniature dachshund for a back seat passenger, so we do not need the increased length and width of the 04. The decrease in turning radius of the 04 would be nice. I read where some 04's will be built in Japan, and some in Canada. My first choice would be the Japan version. All 03's are built in Japan. Either car could have the dreaded oil gel problem, but I believe a four month/four thousand mile oil and oil filter change schedule will minimize that possibility.
  • kmhkmh Posts: 143
    The RX330 is the new, next generation of the RX300. So, after dealers sell off the RX300s on their lot, the RX330 should be rolling in.
  • rmd122rmd122 Posts: 21
    My 15K cost $500 at Lexus.

    Does anyone know what the "torque sensing type LSD oil" is listed in the maintenance book?
  • jimxojimxo Posts: 423
    Lexus will announce they beat BMW by 3,000 units and MB by 20,000 units for 2002.

    Congratulations to the people who produce and drive these fine automobiles
  • rcf8000rcf8000 Posts: 619
    Lexus' success is well earned. Build well designed, well priced, highly reliable cars, and treat customers well--what a radical concept! I hope other car makers are paying attention.
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