25-27 freeway easily.

 

Just got my oil changed at STM in Rochester NY filled up and drove 400 miles to Boston MA on one tank of gas avg about 70-75mph on the hwy that to me is UNBELIEVABLE! That is 28.6mpg. There was nothing else in the car but me some cheeseitz, a camera and a grocery store bag full of dirty clothes

 

Just managed 340 miles to a tank, might have been able to squeeze 10-15 more out of her as I drove with my light on for only 10 miles but still, quite pleased

 

25mpg easy driving conservative.

 

I had a pretty solid tank this past weekend. From my last fill-up (I think this past Thursday), I drove 263.4 miles and filled up this morning with 10.37 gallons, which is a 25.4 mpg average for that tank. Not too bad... the first 20 miles or so were just driving to work and back (during which I usually get crappy gas mileage since my one-way commute is around 1.5 miles and the car is barely warmed up by the time I get to work) while having driven from Orange County to North Hollywood twice to see my family while having the A/C on around a third of the time, usually going 75 mph.

By the way, I have a bone stock Evo IX SE and hit 48,000 miles during my weekend trip.

 

20-23mpg. hwy
70-82mph
randomly 2-3psi

HTA3586R .82HS
JMF Drag IM
Kelford 272
ETS L/U

Un-tuned...

I'll get back to you after it's tuned

 

I got to take the Evo on a nice drive thru the mountains a few weeks from Redding Ca to a few places on the coast and even with boosting on some of the inclines I managed about 28 mpgs. Mostly stock just a filter and catback with stock tune.

 

That's pretty good... very surprising, though I think the earlier Evo VIIIs did have the best highway mpg rating so maybe that's part of it.

 

I get roughly 21-22 MPG in my stock daily driver if I drive normal and don't go into boost often. It could probably use some new spark plugs and also a tune.

Last fillup:
12.2 gallons/270 miles = 22.1. Mostly highway @ 65-70mph...

 

Drove from OKC to Galveston, TX and back. Averaged 20.9mpg on E85. Which from what I read should be 25-27 on pump gas. Not to shabby I dont think.

 

I need gas mileage like yours.

What is done to the car? Is it stock ECU? MAF? SD?

 

Stock ECU, MAF, ETS Fmic, ETS Intake, AMS TBE, Kelford 272's, Walbro 255, FIC 1450's, GrimmSpeed EBCS, Exedy Stage 2 HD

 

I hit 28 mpg a couple weekends ago in my bone stock Evo IX SE. It's my fourth-best mpg to date, if I'm not mistaken.

 

Bumping this thread from the dead! After talking to a few Evo guys last weekend, it looks like I get terrible gas mileage. I dont really care but just think its odd.

E85 - 12-14mpg 120-140 miles per tank
Pump - 16-18mpg 180-200 miles per tank

I also fill up when its at 1/4 tank so that could be part of the reason why the miles are low.

I do about 60-70% around town and where I live has a lot of hills. No flat roads. And the freeway, well its always stop and go. The one time I did a long freeway only drive, I got 240 miles and had a 1/4 tank left on pump gas. The mileage hasnt changed from when it was bone stock to now modified with an aftermarket ECU. I think I am going to try something on my next tank. Set AFR targets to 15.5 below 0 vacuum and see what it does (on E85). Might not help though seeing that I am mostly always in boost!