Not all gas benzos call for premium.

My 84 500SEC used RUG. It was one of the reasons I bought it. At those prices it was fairly close to the operating cost of a diesel on the highway since Diesel costs more per gallon.

I tried to avoid a steady diet of cut rate stations and used a bottle of cleaner every five or six tanks full.

Tom W

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.