What Jerry said.
I use Rotella 15-40 in all our vehicles except the ones that require synthetic.
I also buy it by the barrow, it’s not any cheaper, just convenient.

Don

1967 GMC 9500 Fire Ladder Truck
"The Flag Pole"
In the Stovebolt Gallery
1946 2-Ton grain truck
1946 3/4-ton pickup,
1953 1-ton pickup
1957 1-ton flatbed dually,
1954 Pontiac Straight Eight
Of all the things I've lost in my life, I miss my mind the most!