OK guys, picked up a new 2020 volkswagen tiguan for the old lady. I was a little suprised when I saw it took 0W20 508 I think it was, that I cant find anywhere. I have 2 free services every 10,000 miles but after that I plan on doing it myself every 5 or 6K. So the question is can I use the old 502 rated 0W40 or should I just use a 0W20 and Change it more often? Id rather not have to order fancy oil online, it would be nice to be able to pick something up at the local walmart or auto parts store. Did they just change the oil weight because of fuel economy or are all of the tolerances different? Because the 2017 GLI 2.0 that we have still takes 0W40.