I have the funny of the day. My friend was telling me this last night.
Friend takes his Saab to the Chevy dealer to have the oil changed. Service man tells him they are a GM dealer, he would need to take his car to a Saab dealer. Friend asked him what all this stuff on the door jam said about MADE BY GM: 2008. Service man says he doesn't know, but they only work on GM cars.
bwahahahahahaha. Now not only is that funny, but I'm shocked they would turn away a service... unless it only took Saab oil.