Unimog Club UK

It's not garunteed but it's good practice when you put fuel in your Unimog put a litre of two stroke in the tank before filling up, make sure it's mineral, I don't know anything about the fuel where you live but we have low sulphere and bio diesel blended both of which did not exist when these engines were launched ! The two stroke oil will help the pump with lubrication.
Moose