Is this bad for my engine? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 08-07-2003, 05:00 AM   #1
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Default Is this bad for my engine?

Everytime ig et gas i put 93 in...and i put stp gas treatment and STP octane booster...am i wrecking my engine with teh octane booster?????
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Old 08-07-2003, 09:14 AM   #2
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I've found that unless your engine is modified enough to warrant the higher octane, then you're just wasting your money. It will not harm your engine, just your pocket book.
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Old 08-07-2003, 03:31 PM   #3
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Default Re: Is this bad for my engine?

Quote:
Originally Posted by CraZyDriVer868
Everytime ig et gas i put 93 in...and i put stp gas treatment and STP octane booster...am i wrecking my engine with teh octane booster?????
You don't need the octane booster unless you want to fry your plugs; the 93 itself should be sufficient. Heck, running 93 octane alone in my car gives me enough acceleration to scare myself with.

So what problem are you trying to correct with all that?
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Old 08-07-2003, 04:30 PM   #4
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so should i keep using the gas treatment and just stop the octane booster?
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Old 08-07-2003, 04:44 PM   #5
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Quote:
Originally Posted by CraZyDriVer868
so should i keep using the gas treatment and just stop the octane booster?
In the absence of some fuel-related problem, I don't know if I would use either one, but that'* just me...
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Old 08-07-2003, 05:32 PM   #6
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oh ok...i supose you can only clean injectors soo much...so should i just put a bottle of each in when i change my oil?
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Old 08-07-2003, 06:19 PM   #7
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Quote:
Originally Posted by CraZyDriVer868
oh ok...i supose you can only clean injectors soo much...so should i just put a bottle of each in when i change my oil?
Well, it'* like this: Major-brand 93-octane gas has all sorts of detergent additives in it already, to keep your injectors clean, keep the fuel system seals in good shape, give you fuller, bouncier hair, etc. It'* not likely that adding more fuel treatment to that is going to get you even _more_ something-or-other that you haven't got enough of already.

If you were buying discount-priced, no-name 87-octane junk for your old Chevy, then maybe some fuel-system treatment would make sense there, but if you're putting mainstream-branded 93-octane in your Bonne, then I'd say that in your case, fuel-system treatment would be a cure in search of a disease.
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Old 08-07-2003, 08:25 PM   #8
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Like has been previously stated 93 octane has more additives than 87 or mid octane, but I recommend putting in a bottle of Chevron'* Techron in the tank every time you change your oil. Its a concentrated version of the stuff Chevron has in their gasoline and is fully synthetic. You'll pay 6 bucks for it but its hard to find any that is better for that price.

Yeah definetely don't waste your money on that STP stuff everytime. They recommend it but... of course they do.
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Old 08-07-2003, 08:47 PM   #9
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i always put 87 in mine and it seems to run ok...ive considered 93 but it seems a waste, if i had a */C then i would put it in it...unless someone has a point to y i should run 93?
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Old 08-07-2003, 10:31 PM   #10
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Quote:
Originally Posted by Muslimsteel
i always put 87 in mine and it seems to run ok...ive considered 93 but it seems a waste, if i had a */C then i would put it in it...unless someone has a point to y i should run 93?
Since you don't have a supercharger, I don't think you have "PREMIUM FUEL ONLY" on your dash, do you? Assuming you don't, you might want to at least try 89 octane and see if you get better performance.

Right now, your knock sensor is probably retarding the engine so that you don't hear any knocking, but if you get a tankful of 89 octane, you might give the knock sensor a little less work to do, and find that the engine performs better. Certainly worth a try...
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