All highway, 55-60mph, costing down hills that will maintain 55+.
Do it all the time(when I have time to drive that slow). South Lake Tahoe to Willow Springs Raceway and still have 3/8 tank left. If I drive 80mph, I have to stop for gas. That takes 20 minutes. 80mph=1/2 hour shorter drive time. Plus I've seen gas along 395 top over $4.00 a gallon.

 

30mpg is nuts and unheard of. but then again i never drive 55mph non stop. if i'm on the freeway i'm going 80-90mph. but i really dont see how 30mpg is attainable.
the majority of evo owners average 17-19mpg and so do I

 

I got 27mpg on my way home after buying my evo last week and that was cruising at 75mph on the freeway with several miles of stop and go city driving and I got on it a few times cause I just got the car... But with a mix of city and highway I get 22-24mph (I've put over 1k miles on it in a week and a half)

 

Do people with this car notice a bump in mpg's with a full exhaust upgrade (housing & TBE)?

I ask because one of my previous cars was the 2003 sentra SER Spec V and that thing (although NA) got 180 miles per tank (10 gal light came on). Well after doing header, exhaust, intake and balance shaft removal, the miles per tank bumped to 260 (normal driving) and 240 (with racing).

Oh and one thing I noticed about the EVO is that it likes to be high rev'd. I tried shifting at 2.5k rpms and cruise under 2k rpms but that yeilds me around 16-19 mpg. But when I shift around 3k rpms cruising above 2k rpms I get around 23-26 mpg. Basically following the manual yeilds me the better gas mileage.

Also 5th gear seems to not help with the mpgs unless you are traveling 45 mph or above. I always thought lower rpms = less gas, but this car loves to get rev'd, so reving I shall do.

 

I get 23-25mpg on the HWY. And I'd say I drive more than 99% of the people on here. I have 86k on my car right now and my car dyno'd 310 on a DD dyno over 2 years ago and hasn't been touched since.

I'm curious as to how many even know the proper way to figure out your gas mileage.

 

Well, hopefully fill up full tank and reset miles travelled. Then during the next fill up divide miles travelled by gallons filled rounded to the nearest tenth.


Any one replying their MPG's should also mention what rpms they shift at and around what rpms they cruise. Also if they accelerate lightly but longer range or give a bit more gas with shorter accel range.

 

Well I was driving around 80 mph, which is like 3200 rpm on a six speed, I do know how to calculate mpg.......31 mpg was what I got driving from NM to San Diego. It seems to me that the factory settings are very rich or the o2 sensor gives a funny reading cause going from 22 to 31 is a huge jump.

 

that is little... well, hard to bealive. 31/26....
You always going downhill?
because the factory estimate is : LANCER
.......................................EVOLUTION RS LANCER..........................EVOLUTION IX LANCER...............EVOLUTION MR
City/Highway (mpg/mpg): ...........19/25................................................ ......19/25.................................18/24

and i basicly always around that,if i'm not pushing.So you better check it out what is that o2 sensor reading, before you going to melt something.

 

i only get like 180 to 200 miles per tank

 

Single tank mileage doesn't mean much, you need at least 3 tanks to get a good idea of true gas mileage. But an interesting result, similar to what we saw on our Lancer Devo (Lancer ES) when the O2 sensor went bad (SEL) and was replaced.

Good point about mileage increase possible due to exhaust modification. After replacing just the cat-back part (who's the marketing genius who designed that?) I feel the engine is more efficient now. But I have no data to support this. Has anyone calculated mileage before and after mods?

 

same here, i get that on a bone stock IX MR....should i be getting more?

 

Funny thing about mods that increase airflow, you will have to compensate that by increasing the fuel. So your gas mileage would only increase if the tuner themselves sets something in the AFR map to make you leaner--which is counterproductive for making power. Added air doesn't make power--bigger "explosiveness" in the cylinder does.

Subsequently, as you add power mods your gas mileage will more than likely decrease, not increase. There are a lot of other factors that go into gas mileage, driving habits, fuel grade, tire pressure, engine health, etc. But If there is such a large variance in MPG, I'd say someone needs a lesson in division. I noticed myself that on certain tanks, if the fill up was more that the very next tank I will end up getting a better "mpg" reading due to the fact that the next fill up won't be as much probably--seeing as how the fuel stop is different at every station. Also take into consideration that hills and such will also affect how much gas you'll get into the tank before the fuel stop is triggered etc. I keep track of my tanks of gas--and I noticed when these things happened. I went from 21mpg to 25mpg--but I was driving exactly the same....

The divide method is not exact by any means, and only an average over time will give you a good idea as to what your car is getting.

 

im still getting pretty crappy mileage from my ix mr with only a flash, no drop-in or tbe. im getting 17mpg regularly now when it was 15, very little boost.

 

Ok...the man replaced his o2 sensor....how many of you have actually done this and experienced these results....i see alot of you that replaced the o2 housing but the fact of the matter here is that he replaced the actual o2 sensor as well....

who knows....that $330 OEM denso o2 sensor might be a piece of ish and the $70 universal bosch replacement might be a bit more accurate in reading the fuel and allowing for better fuel trim adjustments and allowing it to be a more fine tuned than the OEM was..remember, that the Bosch sensors are the ones used by those that do wideband tuning (like the zeitronix and the LC-1) although this sensor in question is in fact a narrowband sensor..lets here from those that actually replaced the OEM denso sensor with this after market Bosch sensor and let all the others see what results are provided instead of polluting this thread with "no way" or "yeah right"

I will be getting this replacement here pretty soon and see whats up....might just be worth it and be a good fuel economy mod for those tight in the pockets.....and for me in Cali at $3.49 a gallon of 91 oct....i can afford to try the $70 mod once to see if the fuel consumption increases in the long run since just one tank of gas is in the $45 range now a days...

 

16-17 mpg shifting at approx 3500 cruise right around 3000, short accel range...maybe its just me but doesn't the number of passengers(overall weight) affect gas mileage? cuz i'm always rolling with at least 3 ladies in my car ..i can get about 18-19 on the rare occasions i ride solo ...and no they're not fat girls...