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30 Closed Cab PU · 02-10-2019, 12:56 AM

I do understand the W for a 10W40 multi viscosity oil, 10W is for Winter.

I thought when you are talking about a single oil like the old SAE 30 ford oil, it was called weight. 30 weight, oil that is not modified. If not referred to as weight what is the proper term for it?

02-10-2019, 12:56 AM	#21
30 Closed Cab PU Senior Member Join Date: Aug 2018 Posts: 2,332	Re: 30w oil I do understand the W for a 10W40 multi viscosity oil, 10W is for Winter. I thought when you are talking about a single oil like the old SAE 30 ford oil, it was called weight. 30 weight, oil that is not modified. If not referred to as weight what is the proper term for it?