When my evo was stock, I would get about 25mpg with 100% freeway driving on 91oct.

Now with cams, turbo, free flowing inlet and outlet, I have achieved 28.4mpg on 91octane @ 75mph for the entire tank. Never hit the brakes, and maybe got into boost a couple of times (got to love wide open Wyoming roads!). That trip resulted in 359 miles -12.65 gallons.

 

i'm jealous of all you guys going 300+ a tank. best i got was about 250 to the tank which is about 23mpg rarely boosting. then again that was only about 50% highway driving

 

You just need to learn how to control yourself better. It's not that hard to beat that.

 

i dont think or remember ever seeing 300+ PERTANK i would be stoked if i could get that either 1 you guys have No mods.. 2 your shifting at 3-4 grand everygear or 3 nothing but Highway Miles ........my best is 240-255miles refilling to 13.5gallons either city driving or freeway miles but im not complaining i think thats alot with the mods i have

 

damn don't remember the miles but remember the mpg...25.6

 

I think my best is 280 miles, mixed city/highway.

 

Here is my personal record, I took this pic the exact mile the light went on, so it's the most miles I've ever got PRELIGHT:


Draining the tank doesn't count!

 

Anyone running mods targeted at mileage?

Leaner afrs for idle/cruise, adjusted MIVEC advance at cruise, stronger ignition system and wider gaps, indexing spark plugs to face intake valves, front/rear undertrays to reduce drag. Wing removal for less drag. Weight reduction..... Advance spark timing at cruise to increase vacuum. Pondering adding a bypass line with a solenoid which would allow the wastegate to instantly see manifold pressure at the flip of a switch....

I have a feeling that you can squeeze some more mileage out of these cars if you try. I just don't think anyone is trying. As long as mileage mods don't get in the way of real performance, I'll happily spend time tuning my highway mileage since it's "free money".

I also run only a quarter tank at a time, no more than a half tank for longer drives. I'll have to force myself to fill up one of these days so I can get some of my numbers on here.

 

 

You know I noticed that too when I proof read my post. I even half joked with myself that someone would call that out.... Gotta love EvoM

 

I know that some of you may already know this... but if we're going to have a fuel efficiency post, I think it needs to be said (and I didn't see it mentioned).

So, I come from an aviation background, and the reason aircraft NEVER calculate fuel economy in MPG is because it's completely inaccurate. We ALWAYS use GPM because of this...

To do a brief comparison, MPG tricks people's perceptions. Replacing a car that gets 14 MPG with a car that gets 17 MPG saves as much gas for a given distance as replacing a car that gets 33 MPG with a car that gets 50 MPG (about 1 gallon per hundred miles). MPG obscures the value of removing the most inefficient cars. A 14 to 20 MPG improvement saves twice as much gas as a 33 to 50 MPG improvement.

So... if we really want to see how efficient these vehicles are, I'd recommend calculating your fuel economy in GPM...

I'd be happy to elaborate if necessary, but you could also do a google search on MPG vs GPM and come up with most of the info you'd need (including a calc).

 

on 93 my best is 265 on e85 215. Who else is running e85 and what kind of miles are they seeing?

 

^
i'm recently switched to E85 running on stock turbo with gsc s1 cams. i'm still on my 1st tank but i'm at about 150 miles with only a quarter tank left
not looking so good, but i'm still hoping for 200+!

 

i always average 250+ and i enjoy raping on/off ramps

 

285 miles to a full tank. Wish these cars did a bit better but what ya gonna do. I dont know my actual average MPG but I dont think its anymore than 18-20.