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Personal: Transportation

Fuel Consumption Calculator: Diesel

Tips to Reduce Your Fuel Consumption and Greenhouse Gas Emissions


Vehicle purchasing.

Buy the most fuel-efficient vehicle that meets your everyday needs. Consult the EnerGuide label affixed to new vehicles.


Follow the manufacturer’s recommended maintenance schedule.

A poorly maintained vehicle can consume more fuel than one that is properly maintained.


Keep your tires inflated at the vehicle manufacturer’s recommended pressure.

Measure your tire pressure with a gauge at least once a month, when the tires are cold. An under-inflated tire can increase fuel consumption.


Avoid unnecessary idling.

If you idle your vehicle for more than 10 seconds, you use more
fuel than it would take to restart your engine.


Drive at the posted speed limit.

Driving 100 km/h rather than 120 km/h can reduce fuel consumption by up to 20 percent.

Did you know?

One litre of diesel fuel produces about 2.7 kg of carbon dioxide (CO2).
CO2 emissions are a major contributor to climate change.

Tear off the scale and insert it in the calculator sleeve.

Tear off the scale and insert it in the calculator sleeve



How to Use the Calculator and Log

  1. At first fill-up, record the odometer reading in the log.
  2. At each subsequent fill-up, record the new odometer reading.
  3. Subtract the previous reading from the new reading, and record this figure under kilometres travelled.
  4. Record the amount of fuel purchased in litres (equals amount of fuel consumed since last fill-up).
  5. Using the scale (top window), line up the amount of fuel consumed with the distance travelled in kilometres. Read the numbers aligned with the arrows in the middle window and enter in the log. The scale gives the equivalent values in litres per 100 kilometres (L/100km) and miles per imperial gallon (mi./gal.). The fewer the L/100km, the better the fuel consumption; conversely, the greater the mi./gal., the better the fuel consumption.
  6. The bottom window indicates the CO2 emissions based on the estimated annual fuel use from driving 20 000 km – 55 percent in the city and 45 percent on the highway.

Fuel Consumption Log

Date Odometer reading Kilometres travelled Litres of fuel consu
L/100 kg (or mi./gal.) Estimated annual CO2 emissions (kg) Fuel cost ($)
1/7/05 1
17 700 km
15/7/05 2
18 200 km
500 km
40 L
8 L/100 km (35 mi./gal.)
4320 kg/year

To obtain additional copies of this or other free publications on energy efficiency, please contact:

Energy Publications
Office of Energy Efficiency
Natural Resources Canada
St. Joseph Communications,
Order Processing Unit
1165 Kenaston Street
PO Box 9809 Station T
Ottawa, Ontario K1G 6S1

Tel.: 1-800-387-2000 (toll-free)
Fax: 613-740-3114
TTY: 613-996-4397 (teletype for the hearing-impaired)