Quote Originally Posted by Big TP View Post
I think she is on point.

I also recall reading in one of my car warranty books that you may use full synthetic if you wish but must still adhere to the maintenance schedule as listed. But I would say if running syn and out of warranty, maybe a couple extra thousand miles may be a reason.
On another note, whenever I ran syn on my Harleys it sounded like a car crash in the motor. With regular oil, smooth and quiet.

LOUD engines save lives!