It will run just fine on regular, but for better performance run the premium.
Fuel concerns
Thread Starter
Intermediate
Joined: Jan 2011
Posts: 31
Likes: 0
From: Concord Township Ohio
Fuel concerns
I have just purchased a 1995 Corvette with just 35,000 miles on the odometer. I have read in some web postings that the LT1 350 motor with 300 horsepower must use high octane fuel. Is this correct???
Race Director
Joined: Oct 2005
Posts: 11,770
Likes: 175
From: Rolla Missouri
2021 C4 of the Year - Unmodified Finalist
St. Jude Donor '10 thru '25
I wouldn't say "must".
I believe your owners manual will have a statement similar to "For best performance, use 91 octane or higher".
You can safely run 87-89 if you want.
If the computer detects any knocking (due to lower octane fuel), it will retard the timing and you won't get the best performance.
If you have heavy knocking with a lower octane fuel, you can cause engine damage.
I believe your owners manual will have a statement similar to "For best performance, use 91 octane or higher".
You can safely run 87-89 if you want.
If the computer detects any knocking (due to lower octane fuel), it will retard the timing and you won't get the best performance.
If you have heavy knocking with a lower octane fuel, you can cause engine damage.
Safety Car
Joined: Nov 2008
Posts: 4,328
Likes: 15
From: Jacksonville FL
As mentioned, the cars computer lets you run the fuel you want. The difference in cost of regular vs premium is about 0.20-0.30/gal. Do you really want to lose all the performance and mileage you can get for $5.00/tank??
Natty Light will give you a buzz but Michelob just tastes better.
Natty Light will give you a buzz but Michelob just tastes better.
Team Owner
Joined: Jan 2009
Posts: 73,568
Likes: 33
From: Somewhere in Mo
St. Jude Donor '09-'10, '14
I wouldn't say "must".
I believe your owners manual will have a statement similar to "For best performance, use 91 octane or higher".
You can safely run 87-89 if you want.
If the computer detects any knocking (due to lower octane fuel), it will retard the timing and you won't get the best performance.
If you have heavy knocking with a lower octane fuel, you can cause engine damage.
I believe your owners manual will have a statement similar to "For best performance, use 91 octane or higher".
You can safely run 87-89 if you want.
If the computer detects any knocking (due to lower octane fuel), it will retard the timing and you won't get the best performance.
If you have heavy knocking with a lower octane fuel, you can cause engine damage.
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