posted
Brainfart this morning. Fueling up the SS this AM, I guess I was thinking I had the daily driver and filled the tank with 87 octane. Never done that befo’. Since there’s no drain plug on the tank, guess I’ll try burning it through the LS-1. Anybody else ever use 87?
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Have You Forgotten How You Felt That Day? Never Forget 9/11/01. Posts: 184 | From: Harleysville, Pennsylvania | Registered: May 2000
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posted
Yep I tried it in my 01 SS. Doesn't effect anything... the computer should compensate and cut the timing. You may notice a slight loss of power and if if get on it some slight pinging... it won't hurt anything....
-------------------- 2002 SS #5973 Posts: 1045 | From: Seattle, WA | Registered: Nov 2001
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posted
I've read several articles from GM engineers stating that it doesn't hurt anything, although it may result in a slight loss of power.
Posts: 59 | From: Holly, Michigan | Registered: Mar 2002
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FireChicken
11 Secret Herbs & Spices
Member # 2067
posted
quote:Originally posted by HailUofM: I've read several articles from GM engineers stating that it doesn't hurt anything, although it may result in a slight loss of power.
Well, the higher octane gas is made to run at higher compression ratios, so since the computer will adjust spark timing to account for lower octane gasoline, you are probably going to get combustion at a different point in the stroke cycle than normal. If you have combustion at a certain point (lets quantify it by pressure in chamber prior to combustion), and then you have combustion at a second point where the pressure is lower, then you will have a lower power output. However, you are probably not going to notice it unless you really pay attention, or put it on a dyno. My suggestion, is to fill it with the regular octane every day after you drive. That way, you dilute the concentration of 87 octane fuel in the tank, and slowly increase the octane rating of fuel in your tank until you have all but completely burnt away the 87 octane.
I assume your tank had some gas in it before you made the booboo?
Posts: 686 | From: Texas: Hullabaloo, Caneck! Caneck! | Registered: Aug 2003
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posted
Welcome to the Ship of FOOLS . I used up 1/4 to 1/2 and then filled it back with premium. Then used to 1/4 left. You should have no problem.
Posts: 3091 | From: Canton Mi. | Registered: Oct 2002
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posted
Thanks, all. Actually, after a hundred or so miles I haven't noticed ANY difference. Of course, I don't race it around on the street either, so maybe there is a performance loss. So far, though, no pinging or anything. Can't say the same about my old 3rd gen Camaro... it barely got along on 93 octane, let alone putting in anything else... it would ping with the regularity of a submarine sonar unit.
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Have You Forgotten How You Felt That Day? Never Forget 9/11/01. Posts: 184 | From: Harleysville, Pennsylvania | Registered: May 2000
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posted
ran my vette on regular all the time.no problem.
Posts: 1163 | From: Rochester Hills, Mi | Registered: Feb 2000
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Fbodfather
They don't make songs about Volvos.
Member # 1119
posted
shouldn't hurt every once in a while.......would not make a practice of it...esp. if you start to hear detonation......but.....I think many overcompensate by going to 93....that is a waste of money.
-------------------- Posts: 749 | From: Detroit | Registered: Aug 2001
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westell
Hey, could someone hand me a fire extinguisher?
Member # 2034
posted
dealer is always reminding me NOT to run premium and TO run 87 octane or i risk carbon buildup not always the same service writer, but several.
I always run premium and on race gas get tire hop through 1st & 2nd
quote:Originally posted by westell: dealer is always reminding me NOT to run premium and TO run 87 octane or i risk carbon buildup not always the same service writer, but several.
I always run premium and on race gas get tire hop through 1st & 2nd
Take a look at the 2002 Owner's Manual and what octane it recommends. (87 is for the V6, 91+ for the V8.)
quote:From Section 6, page 3: Gasoline Octane If your vehicle has the 3800 V6 engine (VIN Code K), use regular unleaded gasoline with a posted octane of 87 or higher. If the octane is less than 87, you may get a heavy knocking noise when you drive. If it is bad enough, it can damage your engine. A little pinging noise when you accelerate or drive uphill is considered normal. This does not indicate a problem exists or that a higher-octane fuel is necessary. If your vehicle has the 5.7L V8 engine (VIN Code G), use premium unleaded gasoline with a posted octane of 91 or higher for best performance. You may also use middle grade or regular unleaded gasoline rated at 87 octane or higher, but your vehicle’s acceleration may be slightly reduced. If the octane is less than 87, you may get a heavy knocking noise when you drive. If it is bad enough, it can damage your engine.
Posts: 7198 | From: Near Portland, Oregon, USA | Registered: Feb 2000
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Never done that befo’. Since there’s no drain plug on the tank, guess I’ll try burning it through the LS-1. Anybody else ever use 87?
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. I used up 1/4 to 1/2 and then filled it back with premium. Then used to 1/4 left. You should have no problem.
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not always the same service writer, but several.![[Wink]](wink.gif)
