Participating Walmart locations offer $5 off one Castrol Edge Motor Oil 5-Quart Jug or five Castrol Edge Motor Oil 1-Quart Jugs via this printable coupon. That ties last week's mention as the best deal we've seen on Castrol Edge motor oil in over a year. Coupon expires October 31.

Note: You'll need to install Coupons.com software to print this coupon.