I'm having trouble explaining myself.

A straight weight oil, such as SAE 30, is actually "xW-30" where x is not known to the consumer. Perhaps it varies from batch to batch. Perhaps the x is too large. There has to be a result of some sort when you test the oil in a "cold test" machine. What would be typical?

Have you ever heard of someone putting a straight weight oil in the "cold test" machine and determining its winter weight number?

I'm just curious about a typical result. 25W30? or ?

1948 3/4-Ton 5-Window Flatbed Chevrolet

34 Years. Now with a '61 261, 848 head, Rochester Monojet carb, SM420 4-speed, 4.10 rear, dual reservoir MC, Bendix up front, 235/85R16 tires, 12-volt w/alternator, electric wipers and a modern radio in the glove box.