My Hymer manual suggests dumping all but 20L when travelling but also suggests not to exceed the maximum vehicle weight when filling the tank. I can see that if you are going on to a site where you can get water dumping the excess makes sense but what if you are wild camping ?
The dealership suggests it is OK to drive with a full tank.
What do people on here do in practice ?
The dealership suggests it is OK to drive with a full tank.
What do people on here do in practice ?