the large[reverse] bottle of act fluid is the corect amount and I beleve that is 15oz
i always put in 1 more oz. than whatever they ask, in case it drips out or you spill a little or something...
dont do that on a dd! especially if you just drain and dont take apart and clean if you measure what comes out it is close to 1oz left in the nooks and crannies in the dd.a Chane case has allot more room for extra oil to splash around in and a bigger pressure relief hole than a dd