The higher above the oil level the turbo will fit the better. Make sure the drain has as few kinks as possible and use 1" drain hose. Under hard driving the turbo will foam the oil up to 4X its normal volume and cause a temporary blockage that will back too much oil in the bearings and cause premature failure of the seals. Also make sure the oil drain does not enter block too low so that oil doesn't push back up the pipe from hard cornering. Dave __________________ Dave - PDX 1995 318ti - Active Black and Tan. 2005 330xi - Mtech 1 - 6spd - Orient Blue/Black |