replying to Ron, Kath wrote:
I bought a quart of SAE 10W-30 at Ace Hardware. It is their brand motor oil
for all seasons. They told me it is non-detergent. I ran it in my fans all
summer with no problem. I hope this is OK Im starting to second-guess
myself

--
for full context, visit https://www.homeownershub.com/mainte...il-598502-.htm