What octane rating of gas is recommend for the LT1?
Registered User
Joined: Oct 1998
Posts: 3,144
From: Jackstandican
Any gas can be used in the LT1 due to the nature of the knock sensor/module setup being sensitive enough to pick up a fly's fart at fourty paces. Won't hurt anything but performance.
Administrator
Joined: Nov 1998
Posts: 71,094
From: Hell was full so they sent me to NJ
Your 94 Owner's Manual recommends 91-octane.
Use premium unleaded gasoline rated at 91 octane or higher. You may use middle grade or regular unleaded gasolines, but your vehicle may not accelerate as well...... Be sure the posted octane for premium is at least 91 (at least 89 for middle grade and 87 for regular). If the octane is less than 87, you may get a heavy knocking noise when you drive. It it's bad enough, it can damage your engine.
Registered User
Joined: Aug 2003
Posts: 2,925
From: Detroit
i use 94 ultra sunoco whenever possible.
Lowest ive run is 92... i didnt feel a performance difference but my track results showed one believe it or not. well i shouldnt say that, it was one of a couple factors giving me bad results.
previous owner said my car spark knocked on 89 and said he would never try it again.
Lowest ive run is 92... i didnt feel a performance difference but my track results showed one believe it or not. well i shouldnt say that, it was one of a couple factors giving me bad results.
previous owner said my car spark knocked on 89 and said he would never try it again.
Registered User
Joined: Oct 1998
Posts: 3,144
From: Jackstandican
