Also I just noticed the Pennzoil rebate is also in effect again now for 2016 (up to 2 rebates per household)
http://www.pennzoil.com/promotions-national-rebate/
And also Quaker State for 2016 (up to 3 rebates per household)
http://www.quakerstate.com/promotions-national-rebate
I have emails off to both of them to verify Walmart / Amazon purchases will be honored.