Here is a "Chat" I just had on line with the "VW Chat: Jennifer W said: Hello Jack Atherton. My name is Jennifer W. How can I help you? Jack Atherton said: I have a 2014 Passat Wolfsburg, can I use 0-40 Castrol Edge motor oil (It has the VW 502.00 Certification)? Jennifer W said: I hope you're enjoying your Passat Wolfsburg! I will be happy to check into that for you; it will be just one moment! Jennifer W said: I appreciate your patience, Jack. Castrol Edge 0-40 is not on our approved oil list, so we don't recommend it. Jennifer W said: I can email you a copy of the list if you'd like. Jack Atherton said: Please do. However, why do you bother to have a 502.00 certification if you don't honor it? Jack Atherton said: My email is: [email protected] Jennifer W said: Thanks! It's possible the list was updated at a different time than the oil was certified. I apologize I don't have more information. Jack Atherton said: My question remains, if an oil is certified for the 502.00 is it ok to use? Jennifer W said: For us to recommend it, it needs to also be 5W-30 or 5W-40 synthetic oil. If it's not on our approved oil list, we can't recommend it, even with the 502 00 standard. Jack Atherton said: Then what is the purpose of having a standard (Of your own devising) if you don't honor it? There is no oil like you describe available at the car parts stores in Reno. Jennifer W said: I apologize. I will be happy to send you our list of approved oils to help find one that will work for your vehicle. Jack Atherton said: In the VW owners manual that came with the car it says that if the recommended weight of oil is not available in your area you can use any 502.00 oil that is of a weight suitable for your climate. What could be more suitable than 0-40. I shouldn't have this much trouble buying a quart of oil! Jennifer W said: I'm sorry for this experience. I am going by the resources we have available here and don't want to give you incorrect information. Jack Atherton said: Could you refer me to someone with knowledge! Jennifer W said: I checked with a product specialist as well, who also said it isn't recommended. Jack Atherton said: I don't care if it is recommended. I want to know if it will be ok for the warranty. Jennifer W said: If improper oil use causes damage, then that repair won't be covered under warranty.