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Old 01-09-2013, 07:34 AM   #28
WDE46
Registered User
 
Join Date: Sep 2012
Location: Virgo Supercluster
Posts: 8,700
My Ride: 2004 330Ci OBM
I noticed maybe a slight increase in MPG when I replaced my thermostat but not much. I replaced my thermostat and then spark plugs 300 miles later and I get just over 30 mpg at 70 mph in an empty car.
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