What octane of gasoline should I use in a motorhome with a Chevy 350 engine in it?

  • Thread starter Thread starter Deo Gratias
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Deo Gratias

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I just bought a motorhome with a Chevy 350 in it. The Chassis is an '89 Chevrolet 1-ton van. I have never owned a 350 and have no idea what octane I should put in it.
 
It should run on 87 octane, unless someone has done some performance mods to it.....
 
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