I've been using C12 since I got back into bikes ('09) and as I pointed out in past discussions, I'm convinced that the lead content has promoted top-end longevity. Doesn't make sense to be cheap and buy pump "swill" when the extra few bucks you pay for quality fuel, results engine reliability.
Thanks for the info Larry. I always wondered about the differences between all the VP fuels. Myself, cheap as I am, I run a mix of premium pump gas (Shell or Exxon...not Valero) and aviation gas. Don't ask me where to get Av gas...it's a secret!