I'm getting about 11 miles to the gallon,should I be doing better? Using high test gas.

I got about 14-15 on mine. Something must be wrong.

It's hard to provide a meaningful answer without more information.

I don't think 11 mpg would be wrong if you did all city driving.

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Paul S.

2001 E430, Bourdeaux Red, Oyster interior.
79,200 miles.

1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".