It's a bit of an odd question, but what brands of conventional oil are available in 5.5 quart jugs at Walmart? Of those, what is the cost per jug? Also, how much are the 5 quart jugs of conventional oil? I ask as I haven't been to Walmart in a few months, and the nearest one is 40+ miles away, so I'm curious how the drop in oil prices has affected the price of engine oil. Thanks.