Make sure they only use the recommended fluids - Synthetic 5w/40 like Mobil 1 Turbodiesel Truck and especially Shell 134 ATF.

If not, they'll be doing you more harm than good.

__________________
-Evan


Benz Fleet:
1968 UNIMOG 404.114
1998 E300
2008 E63


Non-Benz Fleet:
1992 Aerostar
1993 MR2
2000 F250