You better jump on this 5qt. jug of 15W-50 for $21 cause my local Walmart Superstore doesn't carry it anymore and I've heard rumors that it's discontinued (not the 15W-50 but the jug). I paid $6.80 per qt which is still a great deal compared to Amsoil. I've been using Amsoil 20W-50 for years but now that it sells for more than $11 a qt. , Mobil1 is a much better deal and I can't tell the difference.