When I had my '79 SD, I got 25 mpg, and that was tops. I think your numbers are pretty normal. Though these cars were built for economy, 20mpg back then was miraculous. If you want better economy, step up to a 603. I get 26mpg on the highway, but I still need to have my IP timed and injectors tested.

Thanks
David

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2000 Honda Accord V6 137k miles

1972 300SEL 4.5 98k miles

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