Rotella 15W-40

Branson N Tucson wrote:
For those that change their own oil, Sam's Cub,a case (6 1 gal ) $15.00 off, 65.00 a case.Pick up case yesterday good thru July 17th.

Yes! This is a good deal. This oil also works great for Onan gennys.

"Come to think of it, when (if) oil "breaks down", what does it become? Once those long-chain molecules are broken, they are not "oil" anymore. What is it?"

Sludge. When heated, oxygen combines with the broken oil molecules and they develop properties similar to the binder in oil based paint. They eventually harden and stick to the inside of whatever contains them. It's truly lovely, but, you don't get your choice of colors.

Chum lee