slant 6 oil weight

roccodart440 said

My engine doesn't leak. (440)

I don't tell myself synthetic is better. I read. Although I am a right wing moderate I do believe in science and math. It is impossible to argue that high end synthetics don't offer better protection. It boils down to choice. I don't care what you use. It isn't my money. I do care if anyone provides false information that will negatively affect other people.

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No one is providing false information. Millions of miles in all climates from South Dakota to Miami Florida. High performance to grocery getters. Believe what you read. I do not care. I don't waste money on synthetics. You can, I don't care. I doubt it will harm your engine, unless you go too light. The guy with a 70's slant six does not need synthetic oil let alone light weight oil. As far as being proven, it has not. All the manufacturers and their race teams have stated it is not better. If you think you need it to sleep better at night, and can afford, it go for it. I can afford it and don't use it, you can draw your own conclusions. Every engine I have rebuilt and every car I bought new has at least 250 thousand miles and still runs like new. All with good, "proven inferior oil". Give me a break!