likewise lee we removed exhaust halfway down the car and found the oily substance present although it was dirty black rather than the golden syrup colour/vicousity emitted from the tailpipe.that leads us to suspect engine oil,but from where?the breather alongside the air filter/cam cover was clean inside and the diaphragm is intact ,no filter was insde its housing but have been advised some do and some dont have them according to chassis no.the injectors all have the same leak rate so dont suspect them now.glow plugs require manifold removal to remove/test individual plugs and relay is under there too so will remove that shortly,still cant find out what bearing they will have on regen though.disconected the exhaust pressure sensor and teed a pressure guage into the line and got approx 5psi at idle and 8psi @2000 rpm at the guage .is that excessive back pressure?intercooler and pipework are relatively clear of oil so dont suspect charge side of turbo, can the exhaust side pass oil directly into the exhaust?but would that not give blue smoke?will try more ideas tomorrow and keep you posted any ideas wecome regards paul