Originally Posted by NRG
I use Shell V Power diesel formulated for canadian weather, winter and summer already with same additives for all year round. My MPG is 21-22 except for winter 17-18 on the same fuel. Lots of snow here and -25 to -35C.
There has to be something wrong with your vehicle if you're getting that kind of mileage.
You don't get anywhere close to the amount of snow or cold I see out West here in the Rockies and I comfortably average 24 mpg combined and can get up to 29 mpg on the highway when cruising inside the Park, using the exact same V Power.