Senior VR Member
Join Date: May 2010
Location: Beatrice, Nebraska
Thanked 186 Times in 109 Posts
Octane is the rating of how well a fuel resists pre-ignition... The primary reason for use of higher octane fuel is in an engine with higher compression. Your engine doesn't meet that criteria. You are spending money you don't need to spend. As a matter of fact, I belong to a forum for Victory bikes which do require 91 or better (per the manual) and one of the guys on there is a Vic mechanic... He recommends not burning anything higher than necessary to prevent pinging and knocking, and not run higher octane if you can safely do it, simply because of the slower burning premium can actually cause some carbon buildup. He has seen some bike engines torn down that they determined that the cause was running high octane in an engine that didn't require it. I'm sure someone will come along and say I'm full of it, but everything I've said can be supported by some stuff on the web from the American Petroleum institute... So for what it's worth, I'd save the difference in cost and just run non-ethanol regular....
2011 Victory Cross Country (Black)
2005 C50 (Black)
(Now my son's bike)
Last edited by ggnutsc; 05-24-2012 at 08:50 PM.