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Old 01-09-2013, 07:47 AM   #30
Registered User
Join Date: Sep 2009
Location: Madison, GA
Posts: 1,563
My Ride: '09 335 MT Coupe
Replacing a stuck thermostat will certainly boost your mileage. I have a very short commute in town and have averaged around 18MPG and after the refresh I took it for a quick errand and it jumped to 25.8 but settled at 20 the next day. It was the horrible starting and stalling at slow speeds that drove me crazy but I've fallen in love with driving once again.
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