ran across this today
not sure if it is bmw approved or not but though id share
From any merchant, buy a Valvoline VR1 Racing Oil 1-Quart 12-Pack for $50 or less and get it for $0 after this mail-in rebate. Mail-In Offer Expires May 31, 2011
http://www.valvolinevr1racingoil.com/