Reply to "sumertime oil"

George PAdmin.

The Cleveland was designed to operate on 20W40, that's where the 20W50 came from, as 20W40 is no longer available.

In warm weather, if you're not going to run synthetic, then my recommendation is Castrol 30 weight, with a can of GM EOS or some other ZDDP additive added to the mix. If you have a stock oil pan, run 6 quarts, rather than 5. The single weight oil is manufactured from a better base stock, with a more shear resistant molecule. You'll notice the bottle for the Castrol 30 weight advertises it as heavy duty (HD). This is true for most single weight oils, I happen to be a fan of Castrol. I know a lot of mechanics who are. Castrol will leave the innards of your motor spotless. Bitchen! Its also good at elevated temps, which is why a lot of motorcycle mechanics who were around before the days of water cooled motorcyle engines, are Castrol die hards.

Now, if you want to talk synthetics ....

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5/29/063:22 PM

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