A few years ago Pennzoil had an oil analysis program where they sent you your needed quarts of Pennzoil Ultra Platinum oil for free for you to run in you vehicle and then send in a sample for oil analysis and then they sent you another shipment of free oil. So you got 2 oil changes of free oil for participating in the program. I guess it was to prove how good Pennzoil Ultra Platinum is. Are they still doing that program? I remember reading people’s experience with it. There was a woman Pennzoil representative on this forum that you would email to see if you could participate.