Had about a 10 minute talk with a Walmart auto (oil/ auto stuff) dept. Mgr... Lessee what I remember.. Supertech oil (all grades) are Quaker state (both synth and dino) ST filters are "cheaper made Frams" 5/20 (all brands) is all at least 50% synthetic. Motorcraft oil & filters are going away (I knew this one already) Best one of the bunch.... Mobil 1 EP oils are terrible for the DIY'er, as "you won't ever get under your car except maybe once a year, all kinds of things can go unnoticed when you're not under there changing oil every couple of months). 5/20 "is one of the biggest mistakes in a long time, it's not much more than water." Mgr of that area, he is... (been there many years though, I remember seeing him around that store for a long time).