Oil in the plug holes is a leaky valve cover gasket. The denso part number you have is correct for the ti, I have read that these engines respond better to NGK plugs, but it shouldn't be that bad with densos. Coilpack and plug wires ok? __________________ ~Dave~ 98 328ti Morea Grun slicktop 11 128i space gray slicktop 13 JGC WK2 Deep Cherry Search | RealOEM |