so i go to linden vw to change the oil. the guy takes my car into the bay and drains the oil. so far so good. then the car comes down and he walks away to get some oil. i figure i will keep quiet just to see what he puts in. he comes back w/ some regular castrol synthetic. so after i made a big stink, i convinced him to go ask the service manager. mechanic comes back w/ 3 quarts of 505.01. after waiting for almost 2 hours, they come back w/ 2 more quarts and finish the oil change. obviously dealers still have no clue. better yet, the techs have no clue. because when they ask the manger, the right oil comes out. moral of story: go to the parts dept. buy the oil and tell the service you brought your own oil. unless you have the opportunity to look over and see what the tech is doing, you are probably getting the wrong oil. i hope someone's PD engine blows up due to wrong oil. then maybe VW will do something about this BS!!!!