Changed The Weight Of My Oil

[JSeery]

Originally Posted by Tinker

The heavier oil would certainly quiet things. I used to run straight 30 in florida. So I guess my engine is ready for the strap yard. Last change was just 10w-30.


On a rebuilt motor I wouldn't think a thicker oil would be idealistic. Maybe once the bearings are worn. Just a thought. Flatheads are not a high oil pressure engine. It can be harmful but does have a gratifying gauge viewing.

Wouldn't think you'd have enough temperature change to be an issue!

Car/trucks ran straight viscosity oil for years, modern multi-viscosity oil is just a better option IMO.

A lot of people don't seem to understand the oil viscosity ratings, there are two different temperatures they are tested at high temp (212 deg) and low temp (0 deg). The low temperature rating is indicated with a W for Winter.

As far as I know 25W is about the highest Winter rating that is used. To me using the term "weight" with oil is confusing because it gets mixed up with "winter".