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Discussion in 'Motorized Bicycle Trouble Shooting' started by Cylon, Apr 6, 2017.
Does octane matter? Even with a low comp head?
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.
I wonder if there are any advantages to adding marvel oil to the fuel on my huasheng 4 stroke???
91 is fine is worth the extra cents, race gas...smells good.use when 170+psi or your be sorry.