at least at oreilly if a 5qt jug is on sale and you get 5 quarts of the oil the system automatically adjusts the price to the same as the 5qt jug. so you can get the convenience of quart containers for the price of a big one.pricing is why i buy jugs. If they made pricing similar, I'd go quarts all day. So much easier to get to fill level in vehicles that specify X.352312312 quarts of oil