I recently purchased a 2015 Si Coupe with 46k miles
I noticed that my gas has been going down much faster than I feel it should be. I filled up a fill tank of 91 octane and the fuel economy shows that I have been driving at about 28 MPG and my commute to school is 22 miles total round trip. Just 2 days after I filled up, my gas is reading half a tank. I just want and idea of where the problem could be and if it is or isn’t normal.
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