moin together and first of all a happy new so the car about what it is about: audi 100 avant 2.3 quattro bj 89 1-th question: I have been observing for a long time that oil is leaking out at the candles (it really comes out of the candle and not from the valve lid or servopume!) . It doesn’t bother me special but meanwhile the sourness is already quite big and I would be interested in what the cause is, so that you can take this with you in the next reperature. vll still next to half a year ago I jumped at high speed of the timing belts, since then there is the problem of the further he runs at 3000-3300 turns a bit rough or loud. and does not pull so well !? after that is normal again. spark plugs are also properly dressed and a change also did not bring anything 2-th question: soon he would need a change of oil since this is also long overdue what would you recommend for oil ? so far I only have the cheap 15W – 40 out of the construction market n tilted, which is really not so the optimal.. greets Sparke