but the oil yourself, it degrades in a short time? if you have definitely a problem that will bring behind it anyway.. it happens several times on the engines of the group fiat 1.9 mj that oil degraded after only 5-6000 km from the.. first make sure that the ****llo of oil does not rise above the limit and checks the clogging degree of the dpf, and the temperature and average distance of the regenerations... if so the solutions are two: verify the because it makes so many pre-injections, or disable the control dpf from the map as recommended by colleagues...