Costco doesn't sell the BMW-LL01 approved 0w40 though.
O'Reily/Autozone frequently have oil change specials. 5 qts + filter for ~$30. Just pick up a filter for another car or something.
AW/Terra | ZSP | ZPP | ZCW | iDrive | CA
Mods: BC BR | OEM Blacklines | M-tech rear | custom dual exhaust | M3 steering wheel | BMW SSK | ZHP shift knob | BMW Performance rep spoiler
Varrstoen ES1 19x9.5+20 Front, 19x11+25 rear