Marting, don't use the radiator for turbo return oil. The return pipe should flow downward to the sideplate or the sump ABOVE the oil level. When the oil goes through the turbo it gets frothed up similar to a milkshake so it doesn't really flow well through oil pipes. The pipe should be the same size as what comes out of the turbo and point downward all the way.... I too will be watching this thread.. goodluck
