I filled up again today and I got 13 MPG. This is after getting 15 mpg on the freeway last week.
is a post I made about the low freeway mileage last week.
The question is could the drop in mileage be due to the new K&N air filter I put in 2 weeks ago?
I also dropped in 4 Boshe Single Platinum plugs. I only put in 4 because I can reach the other 2. Could this be causing the drop in mileage?