has anyone seen commercials on tv or anywhere promoting this walmart oil,never right thats why its cheap but is as good as any other syn.oil.We make our minds about products based on how much money companies spend advertising and how cool is the commercial and who is in it,indy 500 race car winner or top athelete and we are sold.I use 10w30 super tech synthetic or any high end oil its all the same after 4000 and 5000 miles its just in your head.I am a limousine driver for 16 years currently i have 380000 on my lincoln town car using gtx castrol and super tech no problems.In the past i have used all kind of synthetic oil ver high end like amsoil ect what a waste of money.My advice change your oil between 4000 and 4500 miles and use any oil but use the best filter on the market you be okay fram and bosch are good thats what i use and by the way this is my 6th lincoln hard to go wrong have driven so many miles.