Mainly because it is available at idparts.com as an option. Their kits used to stock the Febi bilstien but now it is either Liquimoly or OEM. The first kit I ordered from them had 6 liters and you only need 5. I found a vendor to get 4 more to have a whole set for my next change. The Febi bilstien works fine and is reasonable priced. Won't using Liquimoly again, that stuff stinks terrible ughAlright, thanks, that's good to know. I am thinking I may try the Febi Bilstein. Any particular reason why you are planning to switch to OEM?