10w-30 works fine.
There should be some kind of oil cap in at least one of the valve covers.
Recommended is 5W30
how much oil do i need and what kind
SAE 75W90 synthetic gear oil
On the driver's side at the rear of the engine.
The kind that you put in it
85W90 gear oil.
What do I need to do if my 1999 chevy cavailer has water in the oil?
5w30
5W30
5W30 oil.
10w30 weight oil.