little off topic here, but it has to do with walmarts 5 qt jugs. The last 2 M1 jugs I have bought have failed to fill up my sump completely. My sump takes 5qts with a filter change, and the last two oil changes were filled to about a 1/2 a quart shy with mobil 1 5 quart jugs. both times I had to go down to the local parts store and buy a single quart to top off the sump. the next jug I buy, I will be measuring out the amount before I dump it in.