Premium Gasoline in the XJ?
Thread Starter
Junior Member
Joined: Mar 2011
Posts: 86
Likes: 0
From: Panama City, Florida
Year: 1992
Model: Cherokee
CF Veteran
Joined: Feb 2010
Posts: 12,367
Likes: 23
From: Oroville, CA
Year: 1995
Model: Grand Cherokee
Engine: 4.0 with all of the noise and clatter
A higher grade of fuel will not harm an engine, it will not help with horsepower, it will not help with mileage. Higher octane just burns slower than the 87 octane, our 8:1 compression engines will never need to burn premium.
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