This is not the first time I'd heard this (the engine looking amazingly clean with the use of synthetic oil). I like the idea of the motor being clean, but my real reason was listed on the front page. The synthetic oils were originally formulated to deal with the high temperature of aircraft engines, specifically jet engines. By nature our bikes, running with air-cooled engines, are going to run hotter than the average engine. That's where the difference lies. Virtually ANY oil out there, dino or otherwise, will do the jobe of lubricating our engines. The heat they generate dictates a synthetic oil as possibly the better choice. ESPECIALLY during a summer like the last one! From what I've read, the vast majority of us tend to baby our bikes when it comes to changing the oil. That said, we could probably use almost any oil out there--including dino oil. I read an article (where I read this article escapes me) that said the dino oil out there on the shelves today is FAR better than the dino oils from yesteryear, and could probably be run without a second thought. Still, going back to my original point, I breathe a bit easer putting a synthetic oil in my bike as it runs cooler. That's what works for me.
2011 Fat Boy, Vance & Hines Big Shots, SE Stage One air cleaner, Powervision, Mustang sport touring seat, Andrews 48H's, more to follow...