How many km per litre should a loaded Indian truck give by size, and how do I check a transporter's diesel claim?

There is no single official km per litre for a loaded truck; it depends on gross weight, load, route, speed and driving. Check a claim by working out km per litre from full-tank fills and odometer readings, then comparing it with your own trips on the same lane in the same truck class.

Measure km per litre properly

1. Fill the tank full at the start and note the odometer.
2. At the end, fill full again at the same pump if possible and note the odometer.
3. km per litre = km between fills / litres put in at the second fill.
4. Repeat over several trips. One trip can mislead because of traffic, ghats, loading delays or a half-full tank.

What moves the number

• Gross vehicle weight and load: a loaded trip uses more diesel than the empty return.
• Route: hill sections, city stretches and bad roads cut km per litre.
• Speed and idling: long waits at gates and tolls with the engine running burn diesel for zero km.
• Vehicle: axle configuration, tyre pressure, engine age and whether it is BS IV or BS VI.

Red flags in a diesel claim

• Litres billed that imply a much lower km per litre than your history for the same lane and class.
• Distance that exceeds the e-way bill or GPS route by a wide margin.
• Round-number litres on every trip, or fills with no pump receipt.
• Identical claims for loaded and empty legs.

A cross-check through CO2

Litres x 2.68 kg CO2 per litre gives tank-to-wheel CO2. Divide by tonnes x km for kg CO2 per tonne-km. The default per tonne-km factors for India are well-to-wheel CO2e and include fuel production and typical empty running, so a tank-to-wheel figure from a fair claim should sit below the default for that truck class. A result well above it is worth questioning; a result below it does not prove the claim is right.

Worked example: a 1,450 km lane in a tractor-trailer carrying 25 t

• Transporter claims 580 litres: 1,450 / 580 = 2.5 km per litre
• Your last ten trips on this lane in the same class averaged 3.4 km per litre (your records)
• Expected litres: 1,450 / 3.4 = 426 litres, so the claim is 580 / 426 = 1.36, or 36 percent higher
• CO2 at the claim: 580 x 2.68 = 1,554 kg; at your average: 426 x 2.68 = 1,142 kg
• Per tonne-km at the claim: 1,554 / (25 x 1,450) = 0.043 kg CO2, below the 0.0551 kg CO2e well-to-wheel default for a tractor-trailer

The CO2 cross-check passes here, yet the claim is still 36 percent above your own history. Your lane history is the stronger test.

What Senseible does here

Senseible reads diesel invoices and fuel slips at 2.68 kg CO2 per litre, and a quantity that looks abnormal costs 25 points in its rule checks, so the line does not pass as Verified without review. Its logistics calculator gives per tonne-km figures by Indian truck class for comparison.

• Truck freight factor per tonne-km, India
• Use e-way bill distance for freight
• Logistics emissions calculator
• Diesel emission factor

Sources: 2006 IPCC Guidelines, Volume 2, Chapter 3 Mobile Combustion (diesel default), GLEC Framework, logistics emissions accounting method

Last reviewed 2026-10-19.