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Old 01-23-2012, 11:46 PM
Brian Carlton Brian Carlton is offline
Join Date: May 2002
Location: Blue Point, NY
Posts: 25,396
When I worked for Chrysler, they had a Diplomat running at 235F. with a high pressure cooling system. It got about 15% better fuel economy than the standard vehicle.

Never decided to go forward with a prototype vehicle because of durability and maintenance issues.

Suffice it to say...........the warmer you run the engine, the better the fuel economy.
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