I took my 08 1200C in for it's 15K sevice yesterday. I told them that I already changed my engine oil, no problem says he. Then I set 1 quart of Royal Purple Max Cycle 20W50 up on the counter. Service writer ask what that was for. I said I didn't change the primary yet, you guys can do that. He said I shouldn't use that in the primary, WTF. I said you guys talked me into using Royal Purple at my 1K service. I used it at 5K, and the 10K service and nothing has went wrong yet. Now they clame they never put Royal Purple Max Cycle in my primary, just my engine. I just told them to put what ever is in there now. So I don't know for sure if I had the HD brand primary oil or Royal Purple in there.

 

What I'm asking, is Royal Purple gonna hurt my primary, if it's already in there.

 

http://royalpurpleconsumer.com/produ...cle-engine-oil

If this link works, here some of their claims including one that Royal Purple max is safe for wet clutches.

Personally I'm a little leary about using anything other than Harley Formula+ in my 2007 1200C tranny, but that's just me.

 

No problem - the royal purple Max Cycle is approved for wet clutches. Check out:

http://royalpurpleconsumer.com/produ...cle-engine-oil

Harley approves their Syn 20W-50 for primary / trans lube so the viscosity range is fine too. However, these expensive synthetic engine oils have extra additives you don't really need for transmission oil so I'd stick with the H-D Formula +

 

Hey Rok, we made twin posts, surely that makes it good advice.

 

Thanks 1200Cdriver and Rokover.