I just wanted to through this thought out, I am using Wal-Mart Super Tech conventional oil for my rinse phase and I am noticing my car is running a little bit hotter, since Pennzoil Platinum as well as Amsoil XL are Group III oil's could I use them for the rinse phase of Auto-Rx or is it better to stick with plain conventional oil, meaning would the Pennzoil Platinum not rinse as well, I have not done anything yet, and I am just looking for some comments or anyone with knowledge about this subject.