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LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

What octane rating of gas is recommend for the LT1?

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Old Nov 16, 2007 | 12:10 PM
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  #16  
Gtpguy's Avatar
Gtpguy
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Joined: Sep 2003
Posts: 860
From: Seattle
Originally Posted by speed_demon24
You'll lose any money you gained by filling up with the lower octane gas by the decrease in gas millage from it pulling timing.
I'm with Speed_demon24 on this. I once put in 87 just to see what would happen. I only got 190 miles to that tank, driving the same way I do with our 91 premium. Usually with 91 I get around 230-240. Performance sucked as well.

Use premium.
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Old Nov 16, 2007 | 05:46 PM
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  #17  
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drptop70ss
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Joined: Dec 1999
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From: Poughkeepsie NY
I will try the 91 and see if it makes a difference, I was getting around 18mpg between city and some highway driving with the 87. Wont be until spring though, car is off the road for the winter.
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Old Nov 16, 2007 | 05:56 PM
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Stl94LT1
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From: O'Fallon, MO
Originally Posted by SS RRR
I don't believe so. Those stickers were only on the LT4 setups.
My GF's 95 TA LT1 says on the fuel door "Premium fuel recommended".
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Old Nov 16, 2007 | 05:59 PM
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SS RRR
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From: Jackstandican
Originally Posted by Stl94LT1
My GF's 95 TA LT1 says on the fuel door "Premium fuel recommended".
Different from "Premium Fuel Only."
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Old Nov 17, 2007 | 11:31 AM
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  #20  
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Stl94LT1
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From: O'Fallon, MO
Originally Posted by SS RRR
Different from "Premium Fuel Only."
OK, you got me on a technicallity.
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