so im pretty sure one of my local gas stations put regular in my boosted ls-vtec i hate having someone else pump gas


so i believe i was at about a quarter tank so the guy put about another quarter of regular in with the premium the car is fully tuned for premium.

as of right now i went out and topped it off with premium about halftank giving me a full tank

im getting really rich air/fuels about 11 to the bottom of the aem air/fuel gauge(10) in green just holding a steady cruise..

how should i go by getting rid of the regular i just put the premium too top it off about 5 miles ago will it eventually burn it up? should i drive it pretty much till its dry?? just do not wanna burn up my brand new motor with less than 5k on it.. any replies help! thanks!

 

should i just keep it driving on the freeway till the gas light comes on? just don't boost and ill be okay right?

 

yeh dont boost drive around normally eventually it will all burn then fill up with 93 and u should be golden. i pumped 87oct by accident couple years ago and thats what i did.

 

thanks a bunch man!

the reassurance makes me feel good about driving it lol
its my first boosted civic and boost+vtec sounds like ***** gonna explode lol i just cruise it anyway..boost scares the sh*t out of me haha

 

^ fear is good, makes you know your making power

 

^ hell yeah it is lol. another idea is to throw a gal. of toluene in to raise yur octane up. has a 114 rating and has no adverse affects

 

its not really good for your fuel pump to run it empty. they use the gas they are submerged in to help with heat dissipation. you might be better off draining the gas you have in out and use it for the lawnmower or regular car...

 

http://www.team-integra.net/sections...ArticleID=1260

good article on octane rating. where i got the info about using toluene

 

Couple things come into play here- how much boost are you running? Whats the compression ratio? Do you beat the **** out of your engine? How well was the car tuned? Does it have the knock sensor still?

Given the average case scenario your probably just fine. I wouldn't worry about it too much. I wouldn't add any additives to increase the octane (other than fuel, maybe some unleaded 109 depending on availability, if your that worried about it) as that will just foul the plugs out.

But more importantly, how safe is your tune to even begin with if your crusing around with air fuel readings of 11:1 > richer?! If your not in boost there is no reason to be cruising at an a/f ratio like that ever.

 

i just got it a couple weeks ago..

ran the regular out and now just got all premium and its still occasionally doing it mostly now its reading and holding about a 13.0 cruising but at idle sometimes still drops down too 10.5-10.0 if not it ready correctly at 14.6-15.0

its a fully tuned p28 on chrome pro normally it always ran 14.6-15.0 at cruising and at an idle it just randomly started up a couple days ago..im also thinking that their never was regular in it...

i was told that it might be that the plugs fouled up..would that cause the air/fuel readings too act up?

 

i could be. with fouled plugs your air fuel mixture might not be getting a full burn in the cylinder sending raw fuel out the exhaust showimg a rich mix on your o2. wouldn't hurt to try it. how long has it been since you've changed them? In my experience ive been able to get about a good 3k-4k on them before needing changed and that's pushin it.

 

when i picked it up their was 3200 miles on the fresh motor iv been driving a lot its my daily 90miles a day but i don't ever boost during that maybe once a day so iv put about 1500 miles on it so yea you might be right thought they lasted a lot longer than that but i don't know my boosted civic yet


thanks for the comments!

 

ngk bkr7e's at .030 gap is wat u want

 

If it was me I would drain the tank and fill up with the correct octane. I know gas is expensive, but its better the ruining a motor.

 

iv ruled out the possibility that someone put regular in after a couple tanks of premium and its still doing it


what would cause my ride too suddenly be fine one moment than rich the next without me changing anything fully tuned??

i put new plugs cleaned a bunch of sensors could the o2 sensor that the ecu runs off be causing it?