Average MPG for GS400
#17
Pole Position
Join Date: May 2008
Location: Pennsylvania
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I calculate my mpg between fill ups and always average 21. i drive fast, even WOT at times. 100% rural driving (guys, whats the word here...obv not city because its ol Pennsylvania country roads) but yeah you get it.
#19
Instructor
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Went on a road trip about two weeks ago. Car has synthetic oil, and fresh Amsoil in the tranny. I also put a double dose of injector cleaner in the tank. Tires are stock 17inch pumped to 34psi.
I got 710Km on 61 litres of gas. That works out to 29mpg. I was averaging about 75mph with a few hits around 80-85 and some city driving also. This is the best mileage I ever got. Usually I get around 25mpg
I got 710Km on 61 litres of gas. That works out to 29mpg. I was averaging about 75mph with a few hits around 80-85 and some city driving also. This is the best mileage I ever got. Usually I get around 25mpg
#22
Lexus Test Driver
This was with some fairly heavy Zyoxx 20" Wheels with Nitto Neo-Gen 225/35/R20 (Slightly stretched to fit the wheel)
Trying the same fuel with stock 16" Platinum Series wheels, might hit 500 miles with it which would be just over 32mpg average!
#24
Driver School Candidate
Join Date: Feb 2007
Location: NC
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My GS400 has averaged just slightly over 20mpg over the course of the last 4 years and 28,000 miles (140k total mileage). I get in the mid to high 20's on highway trips but I do more city driving than highway, the car has no mods and I check the tire pressure frequently.
#25
Lexus Test Driver
Stock wheels?
I've gotten 29mpg on a tank of straight 75mph driving before (elevations of 2,000-4,000ft, steady rise over 400 miles)
#26
Pole Position
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Join Date: Apr 2004
Location: Lenexa, Kansas
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These are great numbers. I went on another road trip this past weekend and so far have 250 miles on a little over a half of a tank. The last half seems to go fast but it looks promising.
So far I am a believer of Amsoil. I have never seen 23mpg+ in the 6 years I have owned the car!
So far I am a believer of Amsoil. I have never seen 23mpg+ in the 6 years I have owned the car!
#27
My average is 21MPG all around (70/30 city/highway mix)
Personal best over 445 mile trip prior to this week was 28.6MPG (75-80MPH with AC on) I just repeated the same trip but filled up after the first 301 Miles and got 26.48MPG (Cold weather 28-32 degrees) on the second 144 miles I average 37.27MPG. I believe the cruse control set to 65MPH for most of the 144 mile stretch made a big difference (65MPH was not by choice it was a Seasonal Speed Limit Strictly enforced through a section of I-80 in Wyoming) this bring my personal best to 29.21MPG over 445 miles.
Not bad for a 11 year old card with 123K...
Personal best over 445 mile trip prior to this week was 28.6MPG (75-80MPH with AC on) I just repeated the same trip but filled up after the first 301 Miles and got 26.48MPG (Cold weather 28-32 degrees) on the second 144 miles I average 37.27MPG. I believe the cruse control set to 65MPH for most of the 144 mile stretch made a big difference (65MPH was not by choice it was a Seasonal Speed Limit Strictly enforced through a section of I-80 in Wyoming) this bring my personal best to 29.21MPG over 445 miles.
Not bad for a 11 year old card with 123K...