I have a GM 1500 truck with light duty 3.0L diesel. No problems with using the recommended 0w-20 oil in winter when not towing, but in summer (where it gets up to 100F here) while towing an 8K lbs trailer, I'm thinking I need something more heavy duty. I do OCI every 5K miles regardless of anything. What would you say is best from the following list, and do you see any problem using any of these besides the recommended oil:
Mobil 1 ESP 0w-30
Penzoil Ultra Platinum Euro LX 0w-30
Castrol Edge Euro Formula 0w-30
Valvoline European 0w-30
Mobil 1 is the most expensive by far, so would prefer to use one of the other three if they are comparable.
Mobil 1 ESP 0w-30
Penzoil Ultra Platinum Euro LX 0w-30
Castrol Edge Euro Formula 0w-30
Valvoline European 0w-30
Mobil 1 is the most expensive by far, so would prefer to use one of the other three if they are comparable.