[2LZ]

I don't know.... I've heard so much different crap about this it's mind boggling. Friction modifiers, high heat air cooled engines, etc....etc...

I can tell you from my own experience from a lifetime of riding and owning a boatload of different motorcycles, many roached basket cases, that when I was a kid, I dumped in whatever dad had on the shelf. No clutch slippage. Ran fine.

I've always TRIED to buy motorcycle oil but I can also say that our last two Victory's that are MAJOR torque monsters.....I've run regular Mobil 1 in them on occasion and no clutch slippage. Ran fine. I've never had any of my bikes ever slip a clutch due to the oil.

I know, I know, all the "specs and stats" that say you shouldn't run anything BUT motorcycle oil in a wet clutch/high temp air cooled, etc..etc... and all of that, but my personal experience hasn't rang that true. That said, I still try to run motorcycle oil whenever possible.