The '52 Chevrolet operators manual suggests that if you will be operating in an extreme cold environment, you need to add kerosene to the straight 30 oil in order to be able to turn the engine over to start it.
So, with that said, in 1952 the straight 30 weight oil was in all likelihood straight 30 weight.
I do not understand why oil manufacturers today would formulate 30 weight any differently today than they did in 1952.
If they did add something to make today's 30 weight multi-viscosity, would that not be considered deceptive to the consumer?
Last edited by 52Carl; 05/30/2025 2:31 AM.
