hogrotten
Junior Member
Two Reason for me;
What about the people who used synthetic oil (against HD recommendation) because it made the bike run cooler.? Now HD recommends it, and even came up with it's own line. They also put it in all three holes(same oil). Why use the same motor oil in the motor, transmission and primary?
One good reason may be the fact that allthough they are seperate units if one of the seals,(lets say the out put shaft on the motor were to go out.)You would stand the chance of whatever fluid you had in the primary invadeing your engine! And I don't think any of us would like the thought of ATF mixed in with their motor oil! Or their transmission for that matter. :newsmile055:JMTCW.
It's amazing to me that some people think they are better engineers and designers than Harley Davidson. The engineers that built and designed these bikes recommend 20w-50 in all 3 holes. I am not an engineer, and for a company to recommend an oil of there own JUST to make $ is a little hard to believe. The company gives you a 2 year unlimited mileage on new bikes. Put 100,000 miles on what they recommendation and if anything goes bad they replace it.Old school guys need to come up to the 21 century. Metals are changing and so are the designs of motors and trans.Heavy viscosities are going away with new designs. I am not going to be very popular with some of you but this is just my option.
Good point Fireguy,I'd of never thought I'd see the day we'd be using a 5w20 motor oil in a motor(factory recomended in the wifes 05 Honda CRV) and getting 150,000 to 200,000 miles out of them!:30:
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