A few months ago I was averaging 13-14 mpg with very minimal highway driving. (still minimal highway)

Today I'm averaging high 16 thru low 18s with maybe 3 miles a day on the highway with a daily commute of 50 miles round trip.

Not sure where these miles are coming from and I'm not complaining but I think it all happened once I took off my side scoops. Is it possible that the could change my MPGs?

 

Maybe a little but I can't imagine it would be that much of an increase. Have you done a tune up or anything recently? Or changed your driving habits?

 

I haven't done anything mechanical to the car. And I'm still driving the same and the car still has an odd idel

 

Did you put air in your tires, cleaned your filter..... I really don't know, just grasping.