If one sells a quart to oneself over and over for 1 cent each time, one may have purchased 10,000 quarts in a short period of time for only $0.01 per unit.
I declare myself the winner by far.
If you're really getting oil for less than $1 a quart, just imagine how low the actual break even point is. For other products too.
I bet you made that score at the Autozone Black Friday sale last Thanksgiving.
When the Shell rotella 2.5 gallon jugs were on sale for $15 per jug from AutoZone plus the rebate from shell I bought around 40 gallons of it. I bought all they had from multiple stores in multiple states. I think it came out around .25c per quart.
Same here. T5 10W30 SM: 48 2.5 gallon jugs. With rebates it came to ~ .23/quart. T6 5W40 CK-4: 10 gallons at $.03/quart. All for my mechanic who is a good friend.