Walmart offers a selection of Pennzoil Platinum Full Synthetic Motor Oil 5-Quart Jugs, with prices starting from $18.49. Redeem this $10 online rebate to cut the starting price to $8.49. Opt for in-store pickup to dodge the $5.99 shipping fee. Note: The total maximum rebate possible is $20 per person, household or address (e-mail and physical) during the offer period.
There are lots of things Uncle Sam can't touch — so long as you play by the rules.