....
Cars use to have a miles requirement for oil change. But for industrial motors this is an hour duration requirement, by instance for farm tractor, trains, lawn mower etc...
... narrowboats ....
When sold to us, I was told my SABB (not SAAB) engine should have it's oil changed 'about once a year'. However, the 1960s manual tha came with it says "every 50 running hours", so every 50 running hours, the oil is changed.
I'm very keen that people follow the official guidelines and not what the last user might tell you!
Cheers
