Slush impacts my mileage, but te biggest factor when roads are clear but it's severely cold seems to be warmup. Even with a block heater, short trips are awful in winter for me. Doing the same 15 mile trip, I might get 50mpg the first time, 65mpg on the way back, 75mpg on the way there the second time, and 80mpg on the second return trip. Despite coolant temperatures peaking after ~2-5 miles, mpg continues to climb for another 40+ miles.
|