Fuel is the basic need for your vehicle, but you can surely make some changes to save some fuel in Namibia. The changes are as follows:

1. Pumped up tires:
Underinflated tires mean the more kilometers traveled, the more friction is generated, and hence it uses more fuel than usual. 

2. Turn on your AC while driving. 
Driving with the windows down at speeds above 80km/h creates a lot of wind resistance and wastes a lot of gasoline.

3. Get rid of the extra weight in your boot.
If you tend to store things in the boot, in addition to emergency supplies. You better be careful next time. Every 50kg that your automobile gains increase fuel usage by 2%.

4. Drive at a normal speed
At 100 km/h, you'll use up to 15% more petrol and 25% more at 110 km/h. That may encourage you to go slowly, but if you go slower than 50 km/h, your engine will shift into a lower gear, consuming more gasoline. So to maximize fuel efficiency, maintain a constant speed of 50 – 90 km/h on the highway.

5. Stay steady when accelerating.
Don’t go for high revolutions per minute on your accelerator (RPM).

6. Aggressive Brakes
Avoid slamming on the brakes as it increases fuel consumption and requires acceleration again. 

7. High gear cruise 
Maintain cruise gear if you are driving an automatic car and if it is manual, try going for a higher gear to avoid wasting any fuel. 

8. Predictive driving
Consider the path ahead and choose your next step. Rather than slamming on the brakes to come to a complete stop, try slowing down as you approach the red light. Alternatively, while approaching the foot of a hill, begin accelerating as you inch closer to it rather than as you approach it. Avoid strong accelerations when starting your automobile from a full stop or ascending a hill since they will increase your fuel usage.

9. Rush hour route
Traffic consumes more fuel as there is pressure on your engine. Try to commute as early as you can o and from your work. 

10. Don't be idle for too long.
If you are waiting for someone, turn off your engine to avoid your fuel consumption. 
Regular automobile service aids in the preservation of your engine's fuel efficiency. This is because engine components function in tandem. If the engine is not properly maintained, sludge and rust will accumulate between the components, making it impossible to run smoothly. This is why engine oils are essential. Decent high-performance engine oil may assist in minimizing engine friction, fighting sludge, and enhancing fuel efficiency.