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Old 06-16-2008, 10:52 AM   #3 (permalink)
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Join Date: Jun 2008
Location: Richland,WA
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Das Schlepper Frog - '85 Mercedes Benz 300SD
90 day: 23.23 mpg (US)

Gentoo320 - '04 Mercedes C320 4Matic
90 day: 22.44 mpg (US)
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Acetone may get you slightly better mileage in a diesel because it behaves as an aromatic and bumps up the Cetane rating of the fuel a little. There are however commercial additives that are more effective such as Power Service and others don't harm your engine.

In a gasoline engine acetone is not going to get you a thing and may even reduce your mileage.