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Old 11-18-2008, 08:14 PM
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86560SEL 86560SEL is offline
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Join Date: Jan 2003
Location: east Tennessee (southeast USA)
Posts: 3,015
I only use premium in my 1988 300SEL and 1991 LS400, so I could not tell you any different.

As cheap as gas is now (that sounds funny doesnt it?), I would just use premium, but I know what you are saying.....
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