Hey guys. I saw a couple of oils I hadn't seen/noticed before. One is the Pennzoil Ultra Platinum oil. It has a GTL base stock made from natural gas. Also, from what I have read I think it is designed to be burned during combustion, since a lot more engines consume oil now. Not 100% sure. The other is Valvoline VR1. It supposedly a racing oil that they also market to performance focused cars. It has zinc added to it. So has anyone used these? Or shed some more light on them? The GTL sounds interesting, and I've never heard of zinc added to oil.