Ford Mustang Forum - View Single Post - Engine warm up speed
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post #2 of (permalink) Old 10-10-2013
Grimace427's Avatar
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Mercedes has water pumps that are deactivated until reaching a certain temp. There are a lot of things going on to decrease the amount of time it takes to reach operating temp mostly due to emissions and fuel economy. A cold engine consumes more fuel than one at operating temp.

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