i want to know the max mpg i can get

[blueACCORDex]

well I want to know what others are getting when they have 350K miles on their engine....I have eveerything stock and getting about 22 miles city/highway combined so yea.....does anyone get better..and plus I have a stock DIY intake

[JoshM]

I'm getting about 25-27mpg combined.
But, mines mostly city.
On the highways, the speed limit is 70mph, so that's not very mpg friendly.


Edit: 245,000 miles.

[mndude07]

I don't have that many miles on my engine, but I got 31mpg on a 110 mile highway drive with the a/c on.

I have an auto f22a1 with a6 runners, h23 plenum, bored out h23 tb, aem sri, and an axle-back exhaust.

[blueACCORDex]

wow..and how many miles do u have on ur engine?? I wish I could get 27 max...on city..I might get 18 on city...haha

[AllWhiteCoupe]

my odometer read 225K and im about 28 mpg mostly city.

lol, my engine is only 40K though...

[mndude07]

wow..and how many miles do u have on ur engine?? I wish I could get 27 max...on city..I might get 18 on city...haha

I have around 125k

If you do a full tune-up though you could probably improve it. I saw a huge milage increase when I did my IM swap and drilled out my egr ports.

Before that I was getting about what you are.

[blueACCORDex]

yeA a lot of people have like a large amount of miles on their odometer but the engine is like new....mine is like actual enine mileage....which is 350K so yea...haha

[90Haccord]

230K 1990 EX AUTO

23-24 city going 30 mph

33-35 highway going 65mph


Combined 27-31 depending on how much highway driving


Modified electrical system, DIY ram intake, tires at 50 PSI, cleaned EGR valve, cleaned FITV/tightened, cleaned IACV, new spark plugs, new spark plug wires, SEAFOAM'ed into oil and gas, UPPER GRILL block.


Thats all I can think of now lol

[blueACCORDex]

okay kool thanks for so much input im thinkin of bringin my cb in and do a full tune up when I get my suspension done...which would be 2marrow to get an estimate so when I ask for a full tune up what should most likely be included

oil change, tire pumped, idk what else would be done....

[PUMASTi]

I was getting pretty close to 40 hwy on fresh rebuilt a6 head, transmission, new timing belt, water pump, fuel pump, and a few other new things. Now I'm still in the low 30's. This is doing 50-55mph.

[blueACCORDex]

also does topping off on gas waste more gas?? i read that online and so yea...i was wondering...

[Flatline]

also does topping off on gas waste more gas?? i read that online and so yea...i was wondering...

usually does because of more weight... if you only fill up half a tanks repeatedly you might gain 1 or 2 mpg's

[blueACCORDex]

mm...yea idk cuz it said like topping off causes more gas to go into the engine or something..haha...lol yea half tank would be like less weight...so yea..okay thanks...nd also reading that changing the spark plugs can increase 2-3 mpg too??

[90Haccord]

mm...yea idk cuz it said like topping off causes more gas to go into the engine or something..haha...lol yea half tank would be like less weight...so yea..okay thanks...nd also reading that changing the spark plugs can increase 2-3 mpg too??

I wouldn't say they ADD mpg, just regain what should have been there in the first place.

[C91BLX7]

I can get about 375-400 to a tank driving like a dick.

195k I/H/E P12