sallydrive

Hey guys, after my car comes back from the shop i plan on taking a road trip. Does anyone know how long an IS250 can go on a tank of gas?

I usually drive mostly suburban areas and when i do freeway driving, I don't pay attention to my MPG. I drive my car like ti supposed to be driven, casually 70% and sporty 30%.

So my question is, whats the longest you've been on a tank of gas?

boss22

iTrader: (1)

I have noticed that on highway 70mph my does 25-26mpg , However I have average mpg 15.5 on display.

don

iTrader: (2)

Something wrong with your car (or the way you are driving) if you are getting 26mpg on a 250. My 350 gets 28+ on the highway at those speeds.

heyarms

iTrader: (5)

True story, you drive very aggressively or your car has something wrong, you should be able to pull 28+mpg at highway cruising speeds. I've ranged from 28-33mpg.

mikes rx

iTrader: (14)

His location is Connecticut, so it may be due to the gas and/or cold weather.

Here in VA, winter mix gas is different than summer, and yields worse mpg (in conjunction with cold engine/warm-up times/high idle/etc.

Sango

iTrader: (10)

My tank average MPG is about 26 mpg or so get up to 400 miles from full tank.

Driving average is about 24 mpg.

Factors not to get up that high is, driving style, AWD, winter mix?

starknight

iTrader: (21)

I get 28 mpg on fwy...if mix local and fwy, i get like 25.5

Seansvs

For the 2008 IS250 (Manual trans.) the published mileage is:



My car's lifetime average shows right around 24mpg, but since I've got that third pedal, careful driving can stretch that petrol a lot longer if needed! Austin, TX to Waco (100 miles) landed me this a few months back:

Seansvs

However, I think this is the best I've ever gotten on the screen, anybody wanna try to top this monster?

Kurtz

iTrader: (1)

Yes, but the manual gets inferior mileage to the auto, and 97% of 2IS buyers have an auto.

(likewise folks with AWD models will see inferior mileage too to their auto RWD brethren, but not as bad as the manual which is the worst mileage of all 250 sedans)

The official #s for your manual are 18/26, the auto of the same year gets 21/29....the AWD is 20/26

And those are all the "new" EPA numbers, which seem to run lower than real life in my experience.

I get 28-30 on the highway in my 350 (the new EPA numbers say I should get 25, the old ones said 28, one of the reasons I'm not a fan of the newer measure), so I'd expect a RWD auto 250 to put up 30-32 all highway in real life.

There's a number of other threads already on this topic though, some of them very very long with folks posting their experienced mileage, so I expect a mod will merge this into one of those soonish.

laobo979

iTrader: (5)

Tank average dont mean anything miles to fill up does. You can show 42mpg average but get 350 mile on a full tank.

Toymota

The most I've gone on one tank in my 250 was 487.4 miles and it took 15.049 gallons to fill back up, so that's 32.4 mpg. My display reads about 2 mpg higher so it would have been showing 34 mpg. That was all highway in WV in June.

I have noticed that even if you drive completely on a flat highway at a constant speed for a whole tank, the display shows higher mpg at the start of the tank (35 mpg), and goes down steadily until the end (30 mpg), even though you are burning fuel and getting lighter... go figure...

heyarms

iTrader: (5)

I'd compete if you'd driven enough to even let your needle move from Full.

Sango

iTrader: (10)

Have to agree. That number does not mean anything either because I gotten that too on a flat road after filling my gas up. Note, the trip isn't being shown?

When I get my numbers, I look when it's near empty since I reset the trip when it was refilled then look.

Jeff Lange

iTrader: (1)

Indeed.

Jeff