Quote:
Originally Posted by speeder
Synthetic oil has certain advantages over Dino oil, none of which come into play in this application.
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I couldn't agree more. I guess a guy could always spend more on "protection" his motor does not need, if he really wants to.
So, Don and Joe - what kinds of Harleys do you ride, and how many miles have you put on them?
The use of standard Castrol 20W-50 in any air-cooled motorcycle is the worst advice given on this thread, and the only I will directly address as "bull sheet". It is common knowledge, backed up with real world testing and experience, in all air-cooled circles - from HD to VW to Porsche - that that this is among the very worst oils one can possibly use. Even the old muscle car, pushrod V-8 set knows to stay away from this stuff - it kills their flat tappet cams in short order.