Originally Posted by andrewwynn

Winter gas formulation?

I usually get about 21-22 highway and on a trip on the freeway driving an indicated 75-80 (actual 72-77), I was getting a crappy 18-19. Didn't change anything on my car just noticed that the highway mpg is crap. Some days I get 23-24 but haven't seen those since fall.

Do you live where they use winter blend fuel and if so can you drive to where you can get apolitical fuel (no pork funded ethanol mix). I use an app "pure fuel" to find stations that sell non diluted fuel.

Oh: random crappy performance: check your DISA valve. Be very careful removing there is a little pin that falls out it's steel you don't want it falling in the engine!

I have a DIY how to repair for 10¢ vs replace for $225.