Thread: Trans Temp Important for Fuel Economy?
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Old 08-07-2014, 09:53 AM   #6 (permalink)
MetroMPG
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BMW was investigating transmission fluid heaters to aid fuel economy. I can't find the reference now of course, and I don't remember whether it was exhaust scavenging or electrical heating.

In short: the quicker you're at full operating temperature, the better.
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