I go to wally world, the only thing I buy at wally world actually....
They stock a 5qt jug of mobil1 for like 22$...at least it was last time, have not looked since I put the car up for the winter last Oct./Nov. Best deal I have found and all 5qts in one jug...no jug and 1qt hauling to the checkout crap.
I put mobil1 in the wifes zx2 and the mustang, my DD gets dino juice. I am they guy who thinks...why pay a premium for a syn. mix?...one or the other. The DD has a valve cover leak (3.5 DOHC northstar based v6 Oldsmobile intrigue, strong motor but horrible oil control) and with that and 120k looses about a qt a month, I drive it a LOT, I do not see the point in spending the extra to have it leak out/burn/get used.