The 15-40 will work great. I use that in the tractors and the one ton and the car that gets me to work. It's has more than enough zinc for the sliding parts to stay happy.
I usually get whatever I can find at a good price, usually Rotella or Delo or Traveller.
The Turbo Diesel Registry tested a bunch of 14-40 diesel oil not too long ago, all the way from Wal Mart brand to the Cummins recommended Valvoline fancy stuff. Turned out to not be much difference between them, in fact the Wal Mart oil did pretty good! The specs for that type of oil are such that there's not much room for variation and it still get the CI-4 label.
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Today's Featured Article - Upgrading an Oliver Super 55 Electrical System - by Dennis Hawkins. My old Oliver Super 55 has been just sitting and rusting for several years now. I really hate to see a good tractor being treated that way, but not being able to start it without a 30 minute point filing ritual every time contributed to its demise. If it would just start when I turn the key, then I would use it more often. In addition to a bad case of old age, most of the tractor's original electrical system was simply too unreliable to keep. The main focus of this page is to show how I upgr
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