Engine oil lubricating the IP is not true for OM 621 and at least some 615 engines. Does anyone know where the cutoff was between the fuel lubricated pumps and crankcase oil lubricated pumps? I think it was mid 70s somewhere.
Are you sure about that? Ones with the red OEL cap are still engine oil lubricated, but you have to pour the engine oil into them! They don't get it automatically from the engine.
-- Jim
