List the diesel equipment you run. We'll estimate your fleet's annual fuel spend, what a 3–7% reduction is worth, and how much CO₂ it removes. Don't know your fuel burn? Enter horsepower and we'll estimate it from manufacturer data.
Showing an example mining fleet. Replace it with your equipment.| Equipment | Qty | Gal/yr | Fuel cost/yr | Gal saved/yr | Saved/yr | CO₂ t/yr |
|---|
Check anything that applies. These aren't included in the dollar figures. They help us understand your operation before we talk.
A selection of the 110+ customer, private-lab and government-lab results published on zelkam.com/results. Results vary with equipment, duty cycle and fuel.
Fuel used = quantity × fuel rate × hours per year. On-road vehicles use distance ÷ fuel economy.
Fuel rate from horsepower. When you don't enter a fuel rate, we estimate it from Caterpillar Performance Handbook average (medium-duty) consumption for that machine type, using a curve fit to Cat's published models: gal/hr = a × HPb. Typical error against the published models is ±10%, and more for dozers. If you know your actual fuel burn, enter it. Your number always wins.
| Machine type | a | b | Cat HP range fitted |
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Generator sets use a standard diesel genset consumption table by kW and load (¼, ½, ¾, full), interpolated.
CO₂ = fuel saved × 10.21 kg CO₂ per US gallon (2.70 kg per liter), the U.S. EPA emission factor for diesel (2025), the same factor as Zelkam's other calculators. Reported in metric tonnes.
Not included: savings from fewer oil changes, fewer DPF regenerations and longer engine life. Customers often see these, but we don't put a dollar figure on them.
