I’ve already used the search function, but found nothing witty, here it was always 66-70 liters, depending on the equipment. I’ve had an Audi 90 2,3l 20V quattro EZ since 07/07/08.:03.04.1989, MKB: 7A , but no information books, like the operating instructions or similar. The only book I have, but not much new for me is a self-help book (so it’s done). How much definitely fits into the tank, (tank sits behind the back seat, ski bag) is also available)