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Lexus LS 430 Real World MPG

Karen_CMKaren_CM Posts: 5,020
edited March 23 in Lexus
This topic is for Lexus LS owners to share and compare their actual MPG.

"Real World" Fuel Economy vs. EPA Estimates

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  • As titled , 703KMS / 73 liters for LS400 1990 on the high way at qround 100KMS with cruiser control. NOT bad actually.
    This car is imported from Japan and done 78,000KMS.
  • rgswrgsw Posts: 333
    Just drove 1000 miles last week. I got 29 MPG (maybe a slight tail wind) from Albuquerque to Denver. On the way back (with 40 mile per hour head wind) only 25 MPG. All driving was at 75 or 65 MPH. Very pleased with MPG.
  • todd2004todd2004 Posts: 18
    I just completed a 390 mile round trip from Indianapolis to Columbus and back on I 70 at 26.9mpg with an average speed of 74 mph on my 2003 LS430. The mpg was calculated on similiar filled tanks of Shell premium. Winds were out of the west between 10--15 kts both ways.The car computer said the mileage was 27.1 mpg. Great car !! I have 29,900 miles on it and I will be putting Michelin MXV 4 tires on it next week.I have to replace the OEM Dunlops due to poor wear. I am really looking forward to driving it with the Michelin tires!
  • famwaldfamwald Posts: 114
    Re: your tires --- I had Michelin MXV-4 tires on my last two Volvos and loved them. When these factory Dunlops to wear out I'll be putting the Michelins on..
  • bcleepebcleepe Posts: 53
    My wife uses it for commute with an average of 20 mph for stop and go traffic. When I drived it during weekends, I got average 25 mph mostly on freeway with rolling hills.
  • edspider1edspider1 Posts: 195
    I would get about 19.5 in combined driving. About 24 going 75-80mpg. I was pretty impressed actually. These numbers are from the trip computer. I didn't calculate myself. I recently switched to an 2006 M35 AWD. It only gets about 16.5 using a V6 so the LS looks pretty impressive!
  • Just wonder if Michelin Tires are better than Toyo Tires. I have Dunlop tires on my 2004 LS and have approx 25,000 miles on it and seem to have plenty of rubber on them so far.
    I put ToyoTires on my 97 LS but traded it off soon after, so don't know how they lasted.
  • We just returned from a 4,800 mile trip from California to the Midwest and back. We averaged 27.2 mpg overall. Outstanding for a vehicle covering territory at 75 mph, in serenity and comfort.
  • famwaldfamwald Posts: 114
    With the cost of gasoline rising, yesterday I decided to see how the mpg would be going 65 on the interstate instead of the posted 70 mph limit. I cleared the numbers on the display and strictly on the interstate got 30 mpg. That is with no stop/start driving and no major hills.
  • Is it kosher to use regular gas for constant speed long distance driving? I know if I hear the engine pinking that the answer is no. If I use a light foot on the gas pedal and use the cruise control will I be doing any harm to the engine?
  • rcf8000rcf8000 Posts: 619
    I am in the middle of an extended road trip with mostly interstate hwy driving, and on one tank I got 28.4mpg and on the next I got 27.5mpg. I can't account for the difference; if anything, the speeds driven were lower on the second tank. Maybe it's the brand of gasoline. Still, this is pretty good mileage for a car of this size and weight, I think. So much for the claim that nobody can get mileage as high as the EPA estimates. In town I typically get 18-19mpg.
  • rcf8000rcf8000 Posts: 619
    On our first tank of gas in California we are getting only 24.5mpg. I assume that this is due to the formulation of the gasoline for California.
  • I asked my service manager this question - he returned a question to me: How long do you expect to drive the car? His feeling is if you are only going to drive the car for 100,000 miles or so, then use regular - if you intend to keep it longer, use premium. He said he's seen LS models with very high mileage (300k +) that have not yet had major engine work, excepting engine accessory replacements, and he attributes it in part to use of premium fuel. So if this is in fact the case, wouldn't it be nice to know, if buying a used vehicle, what fuel has been used in it? Another good reason for not buying an LS from a rental fleet. You can be certain they live on a regular-grade diet. So I tend to buy the more expensive stuff, always wondering if I'm throwing money away in so doing.
  • Lexus does not sell to Fleets. You cannot buy a lexus from and fleet, rental or otherwise.

  • nvbankernvbanker Posts: 7,285
    That's what I thought....
  • pearlpearl Posts: 336
    You are getting "only" 24.5 mpg on your FIRST tank? In my humble opinion, you are doing pretty well. Remember you are driving a luxury V8, not some econo-box four cylinder. Read the Infiniti M boards. Most of them are getting 16-19 mpg on a V6. Don't blame the California gasoline. Be thankful that in addition to getting great gas mileage vs. almost any other peer automobile, you are also helping the environment.
  • i5cpai5cpa Posts: 1
    I have taken a number of trips between Oregon and Washington along the interstate. Quite consistently, like you, I am averaging about 24.5 MPG with a 1990 LS burning premium gas at 70-75 MPH (When not stuck in traffic.)
  • blk99lsblk99ls Posts: 4
    Is it true that you can only use 93 octane in the 99 LS?
    How about 91?
  • nvbankernvbanker Posts: 7,285
    Can't be. Most places you can't get 93.....
  • patpat Posts: 10,421
    Hmm ... here in SE Va you can't get 91, you can only get 93 if you want something higher than regular octane. I was under the impression that was true in most parts of the country. :confuse:
This discussion has been closed.