Orschelns, a Midwest farm supply store no longer sends me a sales flier in the mail, but today I saw a sale flier in the store that starts December 5, 2017. I didn't see when the sale ends, so if somebody wants to post it, so be it. A lot of posters here come on this site and say they never see it on sale, so I thought I'd post this.
Conoco-Phillips Shield synthetic blind motor oil (Formerly TropArtic oil) is now on sale starting on 12-5-17 for $1.99/quart. The usual weights are included. (5W-20, 5W-30, 10W-30, etc.)