Go to the shop and tell them to do something else as they lost their way into this business.My parents 2012 X5 with the 4.4 V8 twin turbo is on its last legs and sounds like a bucket of bolts being shaken upon cold starts.. I found out their auto shop has been using 0w20/5w20 for the past few years in their engine... We live in South Florida where its quite warm. Maybe lots of owners have made the same mistake using oils much too thin for their engine.