Rappo, I would highly suggest that you use Mobil's Delvac 1 synthetic instead of Mobil 1. Delvac 1 is formulated for use in diesels.
If you can not find Delvac 1, then use Amsoil series 3000 or Delo 400 synthetic. These may be a little more expensive than the synthetics formulated mainly for gas vehicles , but they are worth the added cost.
Good luck on your DYI oil changing. You will be glad that you decided to change the oil and filter. This way you know you will be getting a quality job because you are the one performing the service. Johnny
1986 300SDL 173K
1985 300D [sold]
1996 Explorer 62K