[johnathanf1lm]

Hi guys ive been working/trying to come up with ways to figure out my mpg loss. Yess it is winter time and yes I do only drive my car 2 miles to work everyday with some highway tripps sometimes/shopping. And saddly yes my accent is a automatic but I am really confused on how I have almost a 30% drop I mean ik im not hitting overdrive since its cold before I get to work etc my driving style has not changed. Im begining to think my car engine is losing efficiency in the cold. I am running full syntactic oil with a partual grill block that I was not running in the summer time. Any ideas I think my o2 senor may be going. Open to any other ideas