M.B.Doc,

Thanks for the reply.

I'm using 91 octane premium from either Costco or Arco, but I've been told that, in Calif. at least, all the fuels are essentially the same because the additives are mandated by law. If there's any particular brand you'd recommend, I'll give it a try next fill-up.

Is there any accurate way to check the EZL that doesn't require mega $$ equipment?

Thanks,

Gary