I've never used PUP but it used to be available at Walmart a long time ago but then it stopped appearing on the shelves, today even PP is getting harder to find there, they did have 1 jug of PP HM 5w30 but that grade wasn't available in the regular version. I haven't been to Walmart in sometime because honestly I hate going there and when I do it's usually to purchase oil because no one can compete with their prices, the last time I checked the shelves there were a lot of empty spaces as they were in the process of rearranging that I've read on here. I don't know if it's just that PP 5w30 is so popular or if they just are not keeping it in stock but the price for PP had skyrocketed... and now I just look at their website and it has come back down again and the price is now in line with what it used to cost so go figure.