Im at 23.5 average right now. (IS250 ... equal mix of city and highway)

 

About 22 mpg mixed in suburban commute on the IS350.

 

Im at about 22MPG and 22.9 for average tank MPG. I drive 70% city 30% highway

 

on my awd is250 ive gotten as high as 36 mpg, on a good day i get 22 mpg city driving and on a bad day it ranges from 19-20

 

I do use the digital read out to gauge my mpg, but it is off by 2 mpg, give or take, very often. I find that it depends if I start off very high, around 29 mpg, then drive a bit harder, it'll dip slowly, whereas if you start low, around 22 mpg, and drive easy, it'll raise to around 26-27 mpg, but in the end, get approximately the same miles per tank. But in the end, your total miles between fill-ups is the best gauge. I've gone as low as 320 miles per tank (about 20 mpg), to now 420 miles (about 26 mpg) per tank. I fill my tank and do not top it off, and use those gallons to calculate my mpg. I typically get 16 gallons when I fill up. The most I have ever filled was 16.5 gallons , meaning I have about a gallon left. The most miles I have ever gotten out of a tank was 445 miles, about 27 mpg.

I mostly drive highway now for work, 70-80 miles a day, driving anywhere between 65/70 to 70/75 mph.

I find at times, driving quick in traffic while keeping it on ECT Power, keeps the mpg close to driving normal and just cruising. Power mode is good for rapid acceleration/deceleration, and in terms of mpg, will keep it close to cruising at nominal speeds. Accelerating at high gears is inefficient. Mpg is a trade-off between good miles and good acceleration.

 

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^^^Whoa! Wish I could get that. But I only get 21-23 for mine. Mostly city for me.

 

I have an '08 AWD IS250 w/ 48k miles.

City: ~ 17 MPG
HWY: ~ 26 MPG

^ Seems a little low. I drive really easy, never WOT. And the car is 100% stock.

 

man! my tank average is very poor. idk whats wrong. im getting around 13mpg on the tank avg

 

my average is bad.

my tank average is only 18.5mpg. Mostly city.

and i have a is250

 

you're either doing something very very wrong, or something is very wrong with your car.

(air filter, spark plugs, something...)

I've never gotten less than 16-18 out of a tank and that was all really bad city driving... my lifetime average is more like 23 or 24 I think.

 

The computer in the car says "Tank Average 22.4". But when I calculate it by using the odometer reading and number of gallons to fill up the tank I get 20.96 mpg. This is the second tank of gas for a new 2011 IS 250 with the upgraded 18" wheels...

 

Dang why is everyone's gas mileage lower than i expected lol

Currently im at 29.0 MPG average and 30.6 Tank Avg

70% highway, 30% city

07 IS250

 

You answered the question above.

 

I have an '06 IS350 w/ 63k miles.

21.1 MPG average
2.23 Tank Avg