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gas oil

liquid oil

DESNZ 2025 'Gas oil' — the UK term for off-road diesel, dyed red for duty purposes and used in agriculture, construction and static plant. Chemically close to road diesel but NOT the same numbers: 853.971 kg/m³ and 2.75541 kgCO2e/L against road diesel's 832.361 kg/m³ and 2.57082 kgCO2e/L, about 7% more CO2e per litre. No per-litre calorific value is recorded for this fuel in docs/research-notes.md §4.3 — only the per-tonne Net/Gross CV — so per-litre energy is derived from mass via the density above and labeled accordingly.

Easily confused with

Different products with different numbers. Check you are on the right one.

Density

853.971 kg/m³

at 15 °C (fuel-properties basis)

Heating values

LHV/NCV
  • 42.569 MJ/kg
HHV/GCV
  • 45.286 MJ/kg
Source for all values above

Emission factors

CO₂ ≠ CO₂e — separate metrics, never converted into one another. What these metrics mean →

Worked example: 1 L gas oil converted to every unit
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Converting
1 L · gas oil

At a glance

All results

Energy

Same energy expressed in other units.

Net calorific value · LHV/NCV

LHV vs. HHV — what is the difference?
source-based every figure below
36.35 MJ
10.1 kWh
0.03635 GJ
34,460 BTU

Gross calorific value · HHV/GCV

source-based every figure below
38.67 MJ
10.74 kWh
0.03867 GJ
36,650 BTU

Mass

0.854 kg
source-based

Volume

exact every figure below
1,000 mL
1 L
0.001 m³
~0.264172 US gal
~0.219969 imp gal
~0.00628981 bbl

Emissions

CO₂ and CO₂e are separate — never derived from each other.

region + year every figure below
~2.72 kg CO₂
~2.76 kg CO₂e

Energy density

Energy per unit of mass or volume.

Net calorific value · LHV/NCV

LHV vs. HHV — what is the difference?
42.57 MJ/kg
source-based

Assumptions

  • density: assumed gas oil density 853.971 kg/m³ at 15 °C (fuel-properties basis)
  • heating value basis: energy on LHV/NCV basis, 42.569 MJ/kg
  • heating value basis: energy on HHV/GCV basis, 45.286 MJ/kg

Sources

Follow each source back to its primary document — that traceability is the point. How conversions work →

Sources