Thread: Anyone notice a MPG increase from Magnaflow catback?
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Old 02-20-2010, 09:26 PM   #34
Tru2Chevy
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Quote:
Originally Posted by JL8Jeff View Post
Yes, winter seems to cause a loss of 2-3 mpg regardless of the engine. I've watched my mileage drop that much with 4cyl, V6 and V8 vehicles.
Yup, I go from 17-18mpg to 15-15.5 in my Jeep from summer to winter.

- Justin
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