Yes, poor quality anti-drain back valving could certainly cause that,
allowing siphoning of the oil in the filter down into the pan/case.  A
good filter really is cheap insurance!

David Beierl wrote:
>
> Leaving aside the oil light...I personally recall quite a several people
> writing in to say "Jeez, my van is noisy when it starts up," and hearing
> "Betcha got a Fram filter on it, don't ya?" and coming back to say "Yes I
> did, and when I changed it the noise went away."
>
>
Stuart MacMillan
Manager, Case Program
800-909-8244 ext. 8208

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