Hers: E36 325 M50TU IIRC From M52 onwards the filler was further forwards, so basically 328 onwards. Mine: M52 and S54However, my oil filler one is further forward - more where your cap is resting, so no problem with access. Which model is yours/hers?
25 Metres / 2hr 40 mins 0.3 layer 100% fill
18 metres / 2rh 5 min 0.3 layer 50% fill