I hate it for the OP. One of the reasons everytime I take it in for service, before I leave I always open the hood and check everything. I know that it is a pain in the butt to do, but it is better than driving with an oil cap that wasn't closed correctly. I would let the Service Manager know what happened. Good luck with everything.
'09 E92 ///M3 Interlagos Blue, 6MT
, Silver Novillo Leather, CF Trim, Premium Package, Technology Package, Cold Weather Package, Premium Sound, 19" Wheels, Moonroof-Toy/ '11 E90 328i
Black Saphire Metallic, Premium Package, Technology Package - Daily Driver '02 Nissan Xterra- Daily Driver/ '04 Yamaha R1
-Toy/ '06 Yamaha Raptor 350