Is 89 Octane Bad for Engine?
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Mountain Pass
Joined: Aug 2000
Posts: 144
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From: Centreville, Virginia
Is 89 Octane Bad for Engine?
I know that the owners manual calls for 87 octane fuel. Does it hurt anything or gum up the works to run 89 octane instead? Aside from the extra money I was just wondering.
Thanks. Bill
Thanks. Bill
New User
Joined: Oct 2002
Posts: 24
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From: clinton
Is 89 Octane Bad for Engine?
i have heard this debate from alot of people, most of whom are mechanics and shade tree mechanics. they normally say run better gas. but as far as engineers and chem. they say just run a good grade of 87. your vehicle was designed for it and that is all it really needs. now after high mileage or add ons, just let the motor tell you what it wants. carbon will build up eventually but a more expensive gas won't prevent this. lets say you upto 10cents more a gallon everytime you go to the pump. well i have a 30 gallon tank that i fill up at least once every week if not more. i could just buy a new motor down the road with what i saved.
Laughing Gas
Joined: Dec 2001
Posts: 858
Likes: 14
From: Virginia
Is 89 Octane Bad for Engine?
>i have heard this debate from alot of people, most of whom
>are mechanics and shade tree mechanics. they normally say
>run better gas. but as far as engineers and chem. they say
>just run a good grade of 87. your vehicle was designed for
>it and that is all it really needs. now after high mileage
>or add ons, just let the motor tell you what it wants.
>carbon will build up eventually but a more expensive gas
>won't prevent this. lets say you upto 10cents more a gallon
>everytime you go to the pump. well i have a 30 gallon tank
>that i fill up at least once every week if not more. i could
>just buy a new motor down the road with what i saved.
Very good explaination. . .but for one very common misconseption . . . The Octane rating for a given grade of gasoline has NOTHING to do with the quality of the gasoline. The Octane rating is simply a way to rate a fuels resistence to detonation prior to planned ignition (spark) due to the heat of compression and combustion chamber design
>are mechanics and shade tree mechanics. they normally say
>run better gas. but as far as engineers and chem. they say
>just run a good grade of 87. your vehicle was designed for
>it and that is all it really needs. now after high mileage
>or add ons, just let the motor tell you what it wants.
>carbon will build up eventually but a more expensive gas
>won't prevent this. lets say you upto 10cents more a gallon
>everytime you go to the pump. well i have a 30 gallon tank
>that i fill up at least once every week if not more. i could
>just buy a new motor down the road with what i saved.
Very good explaination. . .but for one very common misconseption . . . The Octane rating for a given grade of gasoline has NOTHING to do with the quality of the gasoline. The Octane rating is simply a way to rate a fuels resistence to detonation prior to planned ignition (spark) due to the heat of compression and combustion chamber design
