OK since purchase and subsequent mileage have done just short of 3000k. Oil was replaced after purchase, funny old thing it is starting to become slightly discoloured now. My problem is having driven oil burners for over a decade+ I have no visual "gauge" to verify oil pollutant levels in a petrol engine. I know the 1.8t is hard on its oil but when do you run and cut for a change? Current go juice is Fuchs/nee/silkolene ester 5w-40. Any advice welcome. Mo.