Last post on Aug 06, 2008 at 6:22 AM
You are in the Lexus LS 400/LS 430
What is this discussion about?
Lexus LS 400, Lexus LS 430, Fuel Efficiency (MPG), Sedan
#9 of 28 2003 LS 430 Mileage
Aug 26, 2005 (2:46 pm)
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.
#10 of 28 2005 LS mpg
Aug 28, 2005 (10:54 am)
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.
#11 of 28 LS 430 - Gas Octane
Sep 04, 2005 (6:41 pm)
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?
#12 of 28 Re: 2005 LS mpg [famwald]
Sep 07, 2005 (7:20 am)
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.
#13 of 28 Re: 2005 LS mpg [rcf8000]
Sep 10, 2005 (6:09 am)
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.
#14 of 28 Re: LS 430 - Gas Octane [flatlander]
Oct 09, 2005 (12:00 pm)
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.
#15 of 28 Re: LS 430 - Gas Octane [rpbassman]
Jan 09, 2006 (4:29 pm)
Lexus does not sell to Fleets. You cannot buy a lexus from and fleet, rental or otherwise.
#16 of 28 Re: LS 430 - Gas Octane [sbadeaux]
Jan 09, 2006 (7:16 pm)
That's what I thought....
#17 of 28 Re: 2005 LS mpg [rcf8000]
Jan 16, 2006 (7:14 pm)
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.
#18 of 28 Re: 2005 LS mpg [rcf8000]
Apr 13, 2006 (3:10 pm)
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.)