Just checked my status online and the two $15 Walmart GCs are in the mail. The Pennzoil $15 rebate that I thought I'd try in addition is "In Process."
Hopefully nobody is smart enough to reconcile the two databases.

Just checked my status online and the two $15 Walmart GCs are in the mail. The Pennzoil $15 rebate that I thought I'd try in addition is "In Process."
I don't believe so. The Walmart $15 GCs expired at the end of August I think. The online Pennzoil $15 rebate that Kain posted earlier is good until November 30:
http://www.pennzoil.com/documents/04946%20PZ%20online%20form.pdf
Other promotions that Pennzoil has:
http://www.pennzoil.com/#/events-and-promotions