I am using between 1.5-2 quarts every ~400 miles in my 2002 PSD. I only have 84K. I have no visble leaks and its not smoking. I am a newbie to diesels but from the reading I have done, it seems that I might have bad injector o-rings. Any checks I can do to verify this? Any other ideas...Are replacing the O-rings DIY or should I take it to a dealer?
Thanks
Thanks