Was at Wally World a couple days ago looking to buy some Mobil 1 to change my Ody's oil before our Memorial day weekend trip. Noticed they had 5 quart jugs of green cap 0w30 and 5 quart jugs of 5w20 but no green cap 0w20. Does anyone know if Mobil 1 makes the 5 quart jug of green cap 0w20, and does anyones Wally World carry it. I don't want to pay 6.97 for individual quarts when the 5 quart jug is 22 dollars. So, I just used Mobil 1 5w20. I am usually an Amsoil buyer, but needed to change the oil on Saturday and didn't have any laying around in the garage. What is the general consensus on which is better...Mobil 1 Green Cap 0w20 or Mobil 1 5w20?