I own a 2012 legacy 3.6r and I was averaging 20 mpgs give or take and when I went to get on the highway I noticed my car mpg dropped to 17 and thought no big deal but it only went down it’s currently at 13.5 I tried running fuel from a different gas station to see if maybe I just got some bad fuel but it did nothing 300 miles after a oil/ filter Change ... no check engine light no misfires no idea what it could be...anyone have any advice or ideas on it would be greatly appreciated!
Sudden mpg drop
in Detailing, Maintenance, and Long-term care
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