Originally Posted By fast68plymouth
Plenty of other choices if you're not comfortable with the Penn Grade stuff.

Driven
Red Line
Royal Purple
Torco
Champion
Lucas

To name a few


IIRC in the past you’ve mentioned guys running lower viscosity than 10w40 have had trouble in tear downs you’ve seen. Appears several here have mentioned 5w30. Could this be an issue and changing brands after an issue crops up isn’t going to solve it?

I want my fair share