onan 4.0 BFA C

I bought a 1985 Itasca Windcruiser. It has an Onan 4.0BFA spec C generator. I need to change the oil but can't see the oil filter.

Can I get oil change instructions online?

onan 4.0 BFA C

You should check with Onan to be sure but I have friends with 4.0 Onans and there is not an oil filter on them. Odd but true.