many many ways to do it. The idea is to try to NOT get oil on the engine mount. The oil will slowly break down the rubber over time causing premature failure. At the least use some sort of grease cutting agent to clean it afterward. I use simple green. I figure if it's biodegradable it can't be too bad for the rubber, I may be wrong. Oil tips: Dexron ATF in the primary, belray or redline in the tranny, amsoil 60 in the engine year round. Got that info from an older hd mechanic. He said the atf in the primary is probably the best to use since it is gm clutch plates, but he said hd won't tell you that cause atf is 2-3 $'s and the hd is $10. So they lose money. His bike has over 140,000 no problems so I will use his info. That's just me. Stay thirsty my friend.