Re: What's the best oil for a old tired engine?
As long as the engine isn't showing signs of excessive blow-by, I would run 10-40w. Some people like to run diesel rated oil like Rotella. I may switch to it at my next oil change. I have been using Rotella in all of my small engines over the last 4 years.
I would not run anything crazy like 20-50w.
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1984 C20, 454, 4 speed named "Gold Member"
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