Fuel Efficiency
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Efficiency (km/l) = Kilometers driven ÷ Liters consumed in the same period. For more accuracy, measure from a full tank until you fill it again and record the odometer km.

A tractor-trailer consumes between 0.29 and 0.40 liters per km (2.5 to 3.5 km/l). A medium truck between 0.13 and 0.17 l/km (6-8 km/l). A pickup or van between 0.07 and 0.10 l/km (10-14 km/l). Factors like load, route, speed, and maintenance affect consumption.

The most common causes are: underinflated tires (increases consumption up to 3%), dirty filters, worn injectors, excess speed, harsh braking, excessive air conditioning, overloading, and unmaintained engines. Up-to-date preventive maintenance can improve efficiency by 5% to 15%.

Premium or Ultra Low Sulfur (ULS) diesel can improve efficiency by 1% to 3% compared to standard diesel, in addition to reducing wear on injectors and the exhaust system. On long highways, the km savings can outweigh the price difference between fuel types.

Yes. At higher altitudes, the air is less dense and internal combustion engines produce less power, which can reduce efficiency by 5% to 10% for every 1,000 meters above sea level. In cities like Mexico City (2,240 m) or Toluca (2,680 m) this effect is noticeable, especially with heavy loads.