That gas and time has to be worth the difference.Ha! Castrol must have heard about Mobil-1's sale, so Castrol stepped up and took another buck off. Cool. As I remember earlier, Madbuyer had the castrol at ~8.33/qt? Over the internet. Easier for me to stop in and pick it up.
Think I'll go stock up for my next oil change and try the Castrol.
Mr. USPS will deliver that case right to my door.