I am planning on grabbing a pail of T6 after work today to do an oil change on my LML. Since getting the truck a couple of years ago, I have used Delo full synthetic 5W-40 and Rotella T6 5W-40.
I am located in Edmonton, Canada.
The truck will normally see 98% of it's use from spring to fall each year, with temperatures not likely below freezing at the coldest, but could see quite high ambient temperatures. It will be used to tow a fifth wheel trailer, and since getting the truck, I've done a cross country trip one summer, and a trip to California the second summer. Definitely will be climbing mountains while towing in high ambient summer temperatures.
I also want to be able to use the truck in the winter, if needed. During the winter season, it is usually stored nowhere that it can be plugged in, at least for the two winters I've had it so far. Next winter will be hugely unknown where it will be parked, as a relative is selling their property where I normally park it over the winter. Winters normally are around -20C (-4F), but it is quite common to see down to -40C/F here. The first winter, I took it out maybe a couple of times on a warmer winter day (probably -10C). Last winter it was started to idle for a bit a couple of times only, and again on warmer winter days. Likely would see the same limited use this winter, but if we end up moving out of the city into the country, I could see it being used more. This scenario is a maybe.
The 5W-40 has normally served me well here, even back when I had a VW ALH which saw year-round use. But I now have the option of getting a 0W-40 T6, same price, and also in stock. In the past, when the 0W-40 was first available, it was either harder to get, or cost more, or both.
I think I know the answer, but would love to hear the rationale of others of why one is better over the other.
I am located in Edmonton, Canada.
The truck will normally see 98% of it's use from spring to fall each year, with temperatures not likely below freezing at the coldest, but could see quite high ambient temperatures. It will be used to tow a fifth wheel trailer, and since getting the truck, I've done a cross country trip one summer, and a trip to California the second summer. Definitely will be climbing mountains while towing in high ambient summer temperatures.
I also want to be able to use the truck in the winter, if needed. During the winter season, it is usually stored nowhere that it can be plugged in, at least for the two winters I've had it so far. Next winter will be hugely unknown where it will be parked, as a relative is selling their property where I normally park it over the winter. Winters normally are around -20C (-4F), but it is quite common to see down to -40C/F here. The first winter, I took it out maybe a couple of times on a warmer winter day (probably -10C). Last winter it was started to idle for a bit a couple of times only, and again on warmer winter days. Likely would see the same limited use this winter, but if we end up moving out of the city into the country, I could see it being used more. This scenario is a maybe.
The 5W-40 has normally served me well here, even back when I had a VW ALH which saw year-round use. But I now have the option of getting a 0W-40 T6, same price, and also in stock. In the past, when the 0W-40 was first available, it was either harder to get, or cost more, or both.
I think I know the answer, but would love to hear the rationale of others of why one is better over the other.