Rep Power: 0

when i got a sri in my 03 coupe, my mileage was usually 320-340 miles before i had to fill up...but now after new ngk iridiums and a sun auto hyper voltage system, it's at 280 when i gotta fill up! wtf? supposedly all the additions were suppose to increase my mileage. i got a gas happy foot too btw.

so what's everyone else able to get on their civics before hitting the dreaded pump? i'm only using unleaded cuz of the high prices...

 
Rep Power: 264

hyper voltage system?! "i'm only using unleaded cuz of the high prices..."....wtf ur not suppost to use leaded u mean 87? our cars dont need anything higher than 87 unless ur turboed and need the 93 octance....did u gain a lot of weight? adding some weight to the car obviously ruins your mpg and do u mean hwy mileage? Iridium spark plugs are used mostly for turboed cars also....so u can use v-power ngk's just to save some money

 
Rep Power: 0

yes i meant regular when i said that cuz i used to get better mileage on premium (my friend is a honda service manager and he recommended premium) but it's so expensive now. i'm a home health nurse so im on the road a lot right now and this loss in mileage is getting frustrating. it doesn't matter either way, highway or city, i was just wondering where everyone is on the mileage scale.

 
Rep Power: 248

I get 34 to 36mpg and I dont even have a converter!! Got v2 intake, iridium plugs, dc race header, pulleys, dc exhaust, and still get around 440 to 480 miles out of a full tank of 87. Dont know, you must be driving your car like it was turbocharged or something. Slow down a little, the harder you push the gas the faster the gas goes bye-bye!! Its a civic!! Even if its got a sri should only use 87.

 
Rep Power: 254

I generally get 33-25mpg and fill up at about 340 miles. I've got a K&N typhoon sri on it and that's the only engine mod.

 
Rep Power: 268

there's kinda already been a thread like this http://www.7thgencivic.com/forums/sh...ghlight=40+mpg

 
Rep Power: 813

22mpg city, 42 highway. check my profile for mods. also make sure you keep up with maintenance like air filter, throttle body and iacv cleaning, lubecontrol.com products, etc.

 
Rep Power: 278

^^ hes right. i get about 30mpg

 
Rep Power: 248

Gearbox what is the iacv cleaning? Im confused on what you mean sorry drawing a blank

 
Rep Power: 279

37 topped off the tank like crazy this week and it went 400mi

 
Rep Power: 813

its the idle air valve on the throttle body. here are pics after spraying with carb cleaner

 
Rep Power: 279

^wow looks brand new

 
Rep Power: 0

i got bout 30-33mpg

 
Rep Power: 248

Thanks again bro Looks like new!! Do you have to replace any gasket when removing the tb? How often do you recommend cleaning this?

 
Rep Power: 0

Just filled up today, 309 miles / 8.817 gallons = 35 mpg

 
Rep Power: 813

there is a gasket yes. between tb and the sensor. might as well change that. but yea just keep spraying until its clean. mine was gunked up alot. idk ive only done it once and it was pretty bad. i think i need to do it again soon cause my idle isnt as smooth as it should be. oh yea when you put it all back on, you have to do the idle learn or rpm will be way off.

 
Rep Power: 476

probably like 37mpg

 
Rep Power: 254

39-40...really slow driving....not letting the vtec kick in as much as possible...great grandpa driving.

 
Rep Power: 248

I call Not possible and you still oviously think vtec kicks in late, it comes on around 2500 rpms

 
Rep Power: 813

it actually comes on at 4500rpms, when the gas is floored.

 
Rep Power: 287

I usually fill up just under half a tank usually and get about 250 or so out of it...farthest I've been is 330 or so. Usually get 34-38(max has been 38.7 on last tank) Just changed spark plugs to iridium plugs half way thro last tank.
Mods are just a K&N replacement filter, Magnaflow exhaust, 17s, and 2 12s.

I think I'm doing good since the lowest I've been is 29.something and that was once. Every other time its been over 32 and I'm surprised cause of the extra weight.

 
Rep Power: 0

Unless you are empty it's pretty much impossible to tell. I've gone to empty on a full tank and went 422 miles. It's supposed to be a 10 gallon tank right? No way was I getting 42.2miles at 75mph.

 
Rep Power: 0

I've made it to tulsa on a tank of gas (400 miles). Was just about empty when i got there though.

 
Rep Power: 254

If I remember right it's actually an 11.5 gallon tank or something... I know I've put almost 11gallons into my car before when I was up around 350 miles and on E.

I could probably drive farther before putting gas in, but I really, really don't trust the fuel guage at all. I've actually seen the low fuel light come on once recently though, so I guess at least I know that works.

 
Rep Power: 813

tank holds 13+ gallons, i forget the point value, either 13.4 or 13.7 i forgot.

 
Rep Power: 287

Yea...cause I know its not 11 since I've filled up with 11 gallons and I wasn't completely on empty yet. I know its in the 13s.

 
Rep Power: 436

ive filled up 12.9 gallons before in the civic. it definitely has more than a 10 gallon tank, but no more than 13.x gallons.

civic i usually get 26 city, 30+ highway
miata i get 24 city, 30+ highway. i need to do a lot of maintenance work on this car to get it running better.

 
Rep Power: 273

i get about 315-350 miles on average per tank before the light comes on. Most of the driving I do is in the city and my foot isnt THAT light ever since im tuned :-p

 
Rep Power: 248

Isnt the vtec in the car used to switch for 12 to 16 valve mode. Thought there was no high rpm vtec. I have read on this before, dont think thats how it works, but you know your **** please explain cause this subject is killing me i need proof!!!!

 
Rep Power: 248

I get about 32 city and 34-37 highway...only engine mod is an aem sri, but i pretty much never go past about 3000 rpm... 4000 max