I've had my 2007 IS 250 w/ X-Package for a little over a year now. It has 12K miles and is in tip top conditions. I've noticed that I have been getting excellent mileage recently. Two weeks ago I was driving back from Sacramento and averaging 36mpg. When I first got my car, I would only average about 28 but now that its broken in I average over 33 on the freeway. At first I thought, the meter was reading wrong but I calculated it manually and got the same MPG. In city driving, I only average 23MPG, but on pure freeway driving with no traffic and cruise control, I get kick *** mileage. Anyone else experiencing this?

 

wow..impressive.. my 350 city driving only gets me 19-20 mpg.. havent tried full-highway cruise though..maybe 26-27?

anyway your MPG is pretty impressive!!

 

I've posted this before but I get a tick over 30 mpg averaging 70 mph on the highway with the 350. Gas mileage in the winter is noticeably less though (probably 10%)

 

Im hardly ever on the freeway... but ive gotten 30+ on some of my longer trips. Id say 35+ is insane though.

 

dude...wtf lol. my lifetimes posted at 19.8mpg right now, tanks at ~21mpg. even on a straight trip on the highway with no traffic, i was getting about 27.6mpg. wish i had your driving styles maybe i should cruise control some more? anyway, grats on the high mpg

 

Ya I get it all the time when I'm driving down the hill, but the up hill milage kills me. But that's great MPG tho .

 

That IS good. I'm doing a little more city driving recently so I'm down to right around 29 mpg for a tank. Pure highway I get about 31-33 depending.

 

Wow... I have never gone over 25mpg even on long freeway trips.

 

i have an '08 350 with 3k miles and am averaging 18.9 overall but if i hit the highway on road trips i get mid 20's

 

That is great to here you obtain 35 MPG. You must have installed one of the State of the Art Magnetic Fuel Line Adapters (Rolling my eyes...lol) off Ebay. I do have to agree, my MPG has improved now that the car is broken in at 12k. The car also drives so much smoother as well. I really never pay attention to mileage or price at the pump to be honest. I wish I could diss-engage the AWD for the summer.

 

Did I mention I live in the Central Valley, close to Fresno? Its all FLAT so maybe that has something to do with my mileage?

 

I avg between 25-30 on the 350.

 

I have IS250RWD, and I only get 35MPG first trip from LA back to NorCal. Second trip, I got only 33MPG.

 

If I baby the entire tank, and do only my work commute of 26 miles each way, about 75% freeway, with great luck on traffic, I can get 28.5 MPG on California winter gas with an IS350. I totally believe you can get your 36 MPG on a long drive to Sacto in your 250 with summer gas and good traffic and wind assistance.

 

Wow! That's awesome. Honestly, I hardly pay attention to gas/mileage until it's time to refill. I live in the central valley too, so I'll have to start checking it out. Nice pic of the IS and Z.