As far as I know, that is only for Gasoline cars, not for Diesel.Not wanting to deal with Oregon and the "attendent only" fuleing issue
Up from the dead.. I recently used valero diesel and my milage dropped 6mpg's, not changing anything else.
I am hoping that this tank empties fast and I can go back to running a quality fuel.. Live and learn.
This. All of the fluids in the drivetrain are harder to move at lower temperatures, so all the pumps (= engine) have to work harder. Also, let's not forget that gassers also show worse mileage in Winter- I know ours always have. Colder air is denser than warmer air, and harder to push through. There is no remedy for this, it's just seasonal facts of life.Winter blend is a minimal part of the culprit, winter itself is the majority of the culprit. Even the difference from driving in 40 degrees vs. 25 degrees has a HUGE impact on economy.