When planning the fuel system for an expedition truck or any long-distance vehicle, most people focus primarily on driving range.

A larger fuel tank means fewer stops and more flexibility—especially in remote areas. But there’s another crucial aspect which is often overlooked: what else on the truck, or in our case the living unit, runs on diesel?

Auxiliary systems such as engine pre-heaters, onboard generators, and even certain cooking setups may also run on diesel.

These systems can significantly increase the overall fuel consumption, particularly in extreme climates where heaters or generators may run for extended periods.

For example, 10% of one of our tanks (= 40 liters) is dedicated for the heating of our living box.

In Yakutsk, Russia, where temperatures dropped to -52°C, that was enough to last 5–6 days. Under more typical winter conditions, it usually lasts around one month.

So to properly size your fuel tanks, it’s important to think beyond the truck engine.

Make a list of all diesel-powered systems and calculate their estimated consumption.

Also, consider whether these systems draw fuel from the main tank or from a separate one.

With that information you can estimate your total fuel needs more accurately.

And this way you can plan your fuel system correctly – installing the right size tank and set up from the beginning.

So once you’re traveling, you can focus on the experience without having to worry about comfort and safety.

 

Andrea & Mike
www.4-xtremes.ch