Yep, he was using Quaker State as a secondary sponsor since he gets his engines from Hendricks. They went after him since they lost Penske, and Stewart needs the extra money that ExxonMobil will give him.
Johnny,
I thought RCR and M1 might hook up together. I went Indy in 88 and all three Pensky cars were on the front row. Great advertising for Pennzoil.