For my open diff, 3.07. I've seen some say exactly 1 liter, and then BavAuto's site says 'your vehicle requires .95 quarts'. So Im just not sure whether to get 1 bottle or two for changing it. It has a 130k and previous owner of 5 years says he cant remember or doesnt have any records of it being changed, so can't hurt to change it just to be sure. doing the tranny too, but I want to see if i can save a few bucks on an unnecessary bottle of gear oil :thumbup: