For me, Shell oil products were used in the nuke plant I worked at.
Almost all grease and oils, in safety related equipment were Shell.
Plus, I can get a barrel of it at Sam's Club. Real handy just to have it in the shop and decide to change oil in something.
Also keep extra filters on hand for everything.
For the ricers, I use Mobile products.

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!