At 260,000 miles the bearing clearences are so big you could probablly run black strap molasses through the motor (kidding lol...). Really though, I live in a cold part of the country and I run 10w40w every winter in my Hotrod (72 Duster)...and in the summer I switch to 20w50w in both my vehicles to keep my engines protected in the heat...kingoftow

 

I replaced the oil pressure switch, resolved the oil light and leak. Thanks