I should know this but just wondering what others feel as to how often to change the oil, in the motor, gearbox & rearend? I realize the dirtier the environment you live in, the more frequent it should happen, but for most of us city dwellers...

235
SM420
3.55 rearend.

Last edited by Gdads51; 03/21/2024 1:02 PM. Reason: add detail to title to better match subject
Craig

My '50 Chevy 3100 5 window, '62-235cu, 3:55 rear
My truck ....... Respect The Rust
If I'm not working on my truck, '65 m00stang or VW camper, I'm fishing with the wife or smoking Salmon.