Does octane matter?

Drewd

New Member
Jul 25, 2008
425
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Colorado
Only on an air cooled engine especially in warm weather while under load. Hot temperatures, high engine loads, carbon build up on pistons all contribute to possibility of detonation which is harmful to an engine. High octane helps reduce the risk of detonation in these circumstances.

If the engine is watercooled then not so much with a low compression head.

Also remember that adding oil to gasoline reduces its octane rating which can also lead to detonation.
 

user48067

Member
Dec 16, 2015
42
0
6
I wonder if there are any advantages to adding marvel oil to the fuel on my huasheng 4 stroke???