siren001

Good Afternoon

I am trying to troubleshoot why my MPG has gone down drastically and trying to complete some VCDS Data Logging. I was wondering has anyone preformed that? What items do you select both for fuel and performance.

I'm trying to figure out if its the combination of winter fuel and wider/ heavier tires. My MPG for a combo city highway went from 19-20 to 15-16

Thanks

Redd

Wider tires will hurt, hard to say exactly how much. If your "winter fuel" means that it went from real gasoline to E-10 (10% ethanol) then that one change typically robs you of 10% of your gas mileage. So 19mpg could drop to just over 17mpg, just from "winter fuel".