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

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.|||normal octane (87ish) should do it.


if you can buy the better stuff reasonably you'll get a little better mileage and it will help to keep the engine cleaner internally too.


also, if the thing seems a bit sluggish on hills or under load the super or midgrade should help with that.


good luck! |||It should run on 87 octane, unless someone has done some performance mods to it.....|||yeah put mid grade, it''ll run cleaner. and do a tune up.|||Higher octane does not equal more power or a cleaner engine. Higher octane levels cause the gas to burn slower in the cylinder. It's important for high-compression motors to prevent predetonation and pinging, but unless someone has done a lot of work to that 350, there is no need.





87 octane is fine.|||use whatever the owners manual calls for.