BayScoobie Posted April 11, 2006 Share Posted April 11, 2006 I loaned my GT to a friend over last weekend. When he returned my car, he told me he had put a full tank of 87 octane gas in The after driving around for about 50 miles, the engine now sputters badly as I accelerate. This stuttering never happened before. Is this permanent? I still have 3/4 tank of this low grade fuel. Do I fill it up with 91 now, or drive around till the tank is empty? ______________________________ Picture Gallery Link to comment Share on other sites More sharing options...
Legasee Posted April 11, 2006 Share Posted April 11, 2006 Add octane booster? I don't know....hope someone will chime in soon In Taiwan now... Link to comment Share on other sites More sharing options...
Penguin Posted April 11, 2006 Share Posted April 11, 2006 Go hit the auto parts store and get the strongest octane booster you can lay your hands on. Put two of them in the tank, and you should bring the octane up. Then drive over to your friend's house and kick him in the balls for being a dumb-ass. Link to comment Share on other sites More sharing options...
GTBoxer Posted April 11, 2006 Share Posted April 11, 2006 My Dad did that to my old car and he just put octane booster in and it did the trick. good luck! Link to comment Share on other sites More sharing options...
see_obxt Posted April 11, 2006 Share Posted April 11, 2006 OH NOOOOOOOO... just kidding... It's not permanent. Don't drive too aggressively on boost for 1//4-1/2 tank, then add the highest octane you can as soon as you can to fill the tank. Yeah, you can add a booster too. Link to comment Share on other sites More sharing options...
wukindada Posted April 11, 2006 Share Posted April 11, 2006 Do you have any stations around you that sell 100oct? If so put in about 4 gal & you should be ok. Prepare yourself though.....4gal = 23-24.00:eek: Toyota 6EATS .........SUCK!!!!!! Link to comment Share on other sites More sharing options...
Legasee Posted April 11, 2006 Share Posted April 11, 2006 Doh!. I was right about the octane booster??!!! +1 about kicking some friend's hacky-sac!! In Taiwan now... Link to comment Share on other sites More sharing options...
2Simpletons Posted April 11, 2006 Share Posted April 11, 2006 Do you have an AP? Are you Protuned? If not, nothing to worry about. You can run 87 in the car in stock form. Link to comment Share on other sites More sharing options...
mwiener2 Posted April 11, 2006 Share Posted April 11, 2006 Don't use octane booster!!! the stuff is crap. It's not labeled in the same octane units as pump gas. When an octane booster says it raises octane by 3 points, that would be equivalent to 0.3 pump octane points. If you have an AP, flash back to stock. Don't drive around like an asshat, take it easy while the cheap gas is in the tank. Use up the gas in the tank. Fill it halfway with premium. Once that is gone, fill up like you normally would. At this point the ECU is in full retard. You can either drive around normally and let it relearn or you can reset the ECU and jump start the process by a couple hundred miles. My Mods List (Updated 8/22/17) 2005 Outback FMT Running on Electrons Link to comment Share on other sites More sharing options...
RabidMonk Posted April 11, 2006 Share Posted April 11, 2006 You could always do the home-brew race gas thing and just spike your tank with Toluene. Toluene is ~103.5 octane, so you can do the math to figure out what it would take to get your current tank to 91. I wouldn't recommend more than a 25% total Toluene percentage in the tank, though (which IIRC is the standard percentage of Toluene in normal 100 octane race fuel that everyone purchases at the track). Do some searches on Toluene and race gas if/until you are comfortable with that solution. Link to comment Share on other sites More sharing options...
mwiener2 Posted April 11, 2006 Share Posted April 11, 2006 Don't do that either...just use up what's in the tank. The engine is designed to run on low octane fuel for emergencies, so one tank isn't gonna hurt it. My Mods List (Updated 8/22/17) 2005 Outback FMT Running on Electrons Link to comment Share on other sites More sharing options...
rallispec Posted April 11, 2006 Share Posted April 11, 2006 http://pictars.com/users/rallispec/87.jpg you'll be fine. most of these cars come with 87 octane from the dealership. Link to comment Share on other sites More sharing options...
hybridandy Posted April 11, 2006 Share Posted April 11, 2006 Most likely the hesitation you feel is the knock sensor pulling timing to protect the engine (at least that's what Honda engines that require premium do). I would agree with the previous posts of driving the engine easy (take that long highway trip you've always wanted to) and filling up with the highest octane you can get at the local pump. I don't think you'll see much of a benefit from parts store octane booster but I would avoid alternative fuels as they can damange oxygen sensors and cats. Link to comment Share on other sites More sharing options...
Th3Franz Posted April 11, 2006 Share Posted April 11, 2006 You could always syphon some out and then put in the proper octane gas... -Franz The end of a Legacy http://www.youtube.com/th3franz Link to comment Share on other sites More sharing options...
vet Posted April 11, 2006 Share Posted April 11, 2006 I've run on 87 before with no problems; just stay out of boost. Link to comment Share on other sites More sharing options...
warnoldscu Posted April 11, 2006 Share Posted April 11, 2006 There's a station in san jose that sells 100 octane, if you search around on here or one of the wrx forums you will find it... I think it's a 76 station, but I've never been, the 100 octane should help you out. Link to comment Share on other sites More sharing options...
Postman Posted April 11, 2006 Share Posted April 11, 2006 Do you have an AP? Are you Protuned? If not, nothing to worry about. You can run 87 in the car in stock form. Link to comment Share on other sites More sharing options...
godwhomismike Posted April 11, 2006 Share Posted April 11, 2006 http://pictars.com/users/rallispec/87.jpg you'll be fine. most of these cars come with 87 octane from the dealership. I got bad gas once and my car had a heart attack and needed a tow. Link to comment Share on other sites More sharing options...
BayScoobie Posted April 12, 2006 Author Share Posted April 12, 2006 Thanks for the great advice! 200 more miles to go with this tank of crappy gas.... argggg driving around below 3000rpm is sooo hard:( ______________________________ Picture Gallery Link to comment Share on other sites More sharing options...
TYNY Posted April 12, 2006 Share Posted April 12, 2006 +1 on kicking you friend's nuts doesn't it say premium only over the gas cap? Link to comment Share on other sites More sharing options...
Legasee Posted April 12, 2006 Share Posted April 12, 2006 http://pictars.com/users/rallispec/87.jpg you'll be fine. most of these cars come with 87 octane from the dealership. I was thinking about this too...I too, doubt that dealers will actually fill up with 91 octane (CA premium)...funny how much we trust dealers/service depts In Taiwan now... Link to comment Share on other sites More sharing options...
BayScoobie Posted April 12, 2006 Author Share Posted April 12, 2006 +1 on kicking you friend's nuts doesn't it say premium only over the gas cap? I'd like to, but he is 6-3' 230#...quite a bit bigger than I am.... ______________________________ Picture Gallery Link to comment Share on other sites More sharing options...
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