ONLY USE VW OR PENTOSIN!!!
These are made to be "life time" or really more like 80,000 miles. Any other fluid will cause premature Tranny failure. This is a VW bug were talking about, so you have to be picky on what fluid you put in. Things like power steering, transmission fluid and brakes are a special blend. DO NOT USE ANY other!! Just be glad you can change this stuff, the car of the future will be recycleable and used for only 100,000 miles.