crazy_vag

The other day I driving home on a flat asphalt highway right after buying gas. I was stuck behind a car, so was doing about 56mph on cruise control for about 20 miles.

Since I had just filled up my tank, I got to see my gas mileage. The info display said my average was 31.5mpg. Keep in mind this is with an IS 350, but I think it's still pretty good.

When the asphalt changed to cement (with a bumps every 20 ft), the mileage dropped to 31.2mpg at same speed.

Anyway, what has anyone had luck with anything higher?

nehal51086

i was actully wondering the same today...on a recent trip i got about 33 i dont rember the exact number...but i had a friend take a pic so ill get back to u on that...and i was going slight over 70...im guessing about 72-73....and this is an IS 250..with me and three other guys im guessing about 500 lbs roughly..as mentioned in a thread about gas..i think that where u get your gas makes a bit of a differnce...the gas from that trip was from petro express....i recently filled up at exxon ill see what i get on my way to school tomrow...roughtly 22 miles on way...

al503

Exactly 30 MPG according to the computer on a 80 mile trip (all highway) averaging 70 mph. IS350. I could definitely see getting 31-32 going 60.

bagwell

I think 41 or 42mph is the most efficient speed -- as soon as it kicks into 6th gear. Over about a 8 mile stretch going 41/42mph with cruise, it was getting about 35.6mpg!!

G35TOIS350

getting 19mpg at 80 mph 2500 rpm on the toll road since the temps have been in single digits. summer at 80 mph 2500 rpm im getting around 23 mpg.

ckaught78

Highest I have had mine is 34.5 mpg

jewel

and to think i was excited to get 26mpg :X

pocky

iTrader: (12)

o_o* Man....I barely get 25MPG, during summer time. Now that it's winter...I'm constantly getting..15-16. Then again, I go to work which is less then 2 miles away. My mileage starts to kick back up to 17-18 on the weekends, but never into the 20's. Since I don't really go anywhere.

n3w813

iTrader: (1)

<--- See my avatar

IS250
avg 70mph, 85fwy/15cty

IS_Mine

IS350

My Average Crusing speed 81 @ 50 miles = 25 MPG

I think thats decent. I bet if I dropped down to 70 I'd be closer to 30.

inecstaz

On a new fill up... going average 80mph on highway... I average 35.3mpg. At least thats what the computer tells me. And thats driving 142miles... about 2 hours....

going from Orange County to Santa Barbara....

with slight traffic.

maz

I never got better than 15mpg. So far 99.9% disgusting Los Angeles traffic city driving and about 650miles on the car.

DKB

18.3 thats on a island where the speed limit isnt above 45 mostly 35-25 although I do 75-80 for about 5 miles of that. The rest is everystop light its a red driving

pocky

iTrader: (12)

At least I'm not the only one getting 15mph.

ABC

For about a 20 mile drive on I-5, i hit 35.2mpg at the end of my stretch. i was rooting it on from 30mpg and up! hahaha