Hello all, have an A3 3,2ltr. currently 4 years old and almost 30000km. Vehicle is coded on Longlife, but after the entry time at approx. 4000km as well as at 17000km and now at almost 30000km always completely changed with Castrol SLX II 0W-30. The problem, (or is it possibly no problem) is when I look into the oil filling opening right at the spray protection I see a completely bare chain tensioner from above. Unfortunately the inner area of the chain has nkasten quite dark spots ( deposits ) does this look like this in the engine or does the oil coal? like to put off on the aluminum of the chain box? Can that be already oil coal in there will be powerful too warm? How can I get the stuff out? Although waste oil does not smell like fuel or the like. But looks like it was 50000km in it. Can I do something with another released oil which may have other additives. Motor behaves otherwise ok, oil consumption is nor times. Or I see the thing to bite A tip of a motor (oil) speci’s would be very nice. Greetings Philipp