I am looking at doing the transmission service to my 09 tiguan se fwd. I have researched just about everywhere on how to do it and how to do it properly and also what I need to get it done. My question is on the fluid itself I have searched around for options for fluid besides the VW stuff. I know the requirement is G-055-025-A2. I have found the ravenol fluid from blauparts that will work as well as the fuchs titan 4400 also febi bilstien fluid and the oem vw fluid. I used to be an amsoil dealer but I no longer am so at this point I am looking for another option other than amsiol or redline. I also saw while searching that mobil atf 3309 will work as well as aisin TIV fluid. Are any of these synthetic? Will the mobil work for the service change I would like to use the mobil because it is the cheapest and I can get it the quickest but I don't want to buy it just because it is cheap I want to make sure I am getting the right stuff.