I've noticed that Q-Horsepower is fairly difficult to find in anything other than a 5w30 grade in the SE part of Houston, Texas. I would like to try the 5W-20 grade in my wife's 2006 Pilot, but seriously cannot find it. With that in mind, is anyone currently using Q-Horsepower? Q-Horsepower and Pennzoi Platinum are both made by SOPUS. I wonder if SOPUS considers these two oils to be equal in terms of marketing, or if they consider Pennzoil Platinum to be a higher quality oil?