Originally Posted By: old1
But, but, but, I can't find oil thicker than 50. LOL----- Personally, IF I wanted to thicken up the oil, I would use STP. Cheaper and not as much dilution, as is a smaller container.
Valvoline VR1 goes up to SAE60. At least it's a real oil with a fairly robust additive pack, too.
The straight weight VR-1s can be hard to find. You'll find 20W-50(what I feed my MG) at most any decent auto parts store. When I was looking for heavy oils to experiment with in the carburetor, I managed to find a dusty bottle of SAE50 at Autozone and another of SAE60 at a large NAPA store.
If you want to thicken up oil with a straight weight, like I said at least VR-1 is an actual motor oil and runs $5-7 a quart at most stores.