> The way my filter is located is vertical, how would it drain out when the
> car is off? It's a bowl...it will hold oil by nature...
> What will the 'valve' buy me?
> Thanks again. Feel free to tell me to shut up and go away.
Hold on here. I should shut up and let someone more knowledgable
talk. You are right. The filter is upside down, so the oil will
sit there by gravity. Lets see what some of the others have to
You've still got a whole block full of oil galleries that can drain back
through the oil filter . . .