I've been doing what seems like endless research on this subject as im planning to change the fluid in my Touareg. I know the VW spec is for G 055 540 A2 and I know there are plenty of compatible synthetic alternatives but in my country (Canada) they are not readily available and once I factor in shipping and exchange from the USA I might as well go down to the dealer and empty my wallet for their fluid.....well actually someones elses fluid with their part number on it. Anyways to the point of my thread. If all of these alternative G 055 540 A2 fluids are WS compatible such as Pentosin, Liqui Moly, Ravenol T-WS etc.....what would be the downfall of just using the factory Toyota WS. At around $8/L and available down the street at the local Toyota dealer it seems like a no brainer but perhaps there is a reason the discussion always ends up with the more exotic brands/fluids??