Hi folks, some info and advice needed please. I just completed a oil change on my dr for the first time. Drained oil well as far as I can tell, added a new filter filled with 2 liter oil and ran the engine for a minute and check the level. To my surprise it registers to the top line on the sight glass which meny on the web rekon is almost to full. My issue is that the manual states 2. 4 liters with the filter chane . The Dr has a oil cooler, is there a prosedure I am missing, does the rad have to be drained in some way? because right now 2*2 is not making 4.any suggestions will be appreciated.