Thumb Score: +14

Woot! [woot.com] has GM GENUINE PARTS GM AC DELCO PF64 OIL FILTER for $3.99.
Shipping is free for Amazon Prime Members (must login with your Amazon account and select a shipping address in order for Woot to apply free shipping) or is otherwise $6 per order.

Price:
$6.50 lower (62% savings) than the reference price of $10.49