I just bought 3 gallons of T6 at Home Depot for $24.23/gallon. It only took two minutes to uploaded a pic of my receipt on the rebate website. I received a confirmatory email immediately afterwards. It was very easy. After rebate price of $17.56/gallon.
I finally got an approval email yesterday. I trusted that the lady on the phone would send the approval through like she said, and she did. It said invalid for a few days after I talked to her but now it reflects approved. I got just the first email telling me its approved and I will get another in a few days with the rebate.
Checked on my rebate status yesterday and it was marked invalid for a non-participating store (TSC). So I gave them a call and the lady told me they needed a couple of weeks to update their system to include TSC. She even took my number and was going to talk to a supervisor about it and get back to me, which I missed that call, but her voice-mail said basically the same thing.
So, I'm hopeful that gets approved by later this month and I don't have to go through the same circus for the clearance Pennzoil from TSC that "the service center" processes the rebates for too