I thought I saw this question recently, but I can't find anything in my searches.
So... which non-synthetic, High Mileage 5W30 is best for a Canadian winter?
Choices are:
1. Pennzoil High Mileage
2. Valvoline HM
3. Castrol GTX HM
So... which non-synthetic, High Mileage 5W30 is best for a Canadian winter?
Choices are:
1. Pennzoil High Mileage
2. Valvoline HM
3. Castrol GTX HM