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Scope and Application
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CAN CGSB 3.0 No. 142.0-2014, published by the Canadian General Standards Board (CGSB), defines the quality requirements for automotive diesel fuel intended for use in highway and off-road diesel engines across Canada. This standard is a cornerstone of Canada’s fuel quality framework, ensuring that diesel fuel delivered to consumers is safe, efficient, and compatible with modern emission control systems. Widely referenced by regulators, fuel suppliers, and engine manufacturers, it establishes mandatory limits on critical fuel properties such as cetane number, sulfur content, density, and distillation characteristics.
Scope and Application
The standard applies to automotive diesel fuel for on-road (highway) and off-road (e.g., agricultural, construction, rail) diesel engines. It covers two primary grades:
- Grade 1-D – A more volatile, lower viscosity fuel intended for cold weather and low-temperature operation.
- Grade 2-D – A general‑purpose diesel fuel suitable for most operating conditions.
Both grades are specified to contain a maximum of 15 mg/kg sulfur (ultra‑low sulfur diesel, ULSD). The standard does not apply to fuels containing biodiesel or renewable diesel blends; those are covered under companion CGSB standards (e.g., CAN/CGSB‑3.517). It also does not cover marine fuels or heavy fuel oils.
Technical Requirements and Test Parameters
Compliance with CAN CGSB 3.0 No. 142.0-2014 is assessed through a comprehensive set of physical and chemical tests. The table below summarises the key requirements for both grades.
| Property | Grade 1-D | Grade 2-D | Test Method |
|---|---|---|---|
| Cetane Number, min | 40 | 40 | ASTM D613 |
| Sulfur Content, mg/kg, max | 15 | 15 | ASTM D5453 |
| Density at 15 °C, kg/m³ | 810–850 | 820–860 | ASTM D4052 |
| Flash Point, °C, min | 40 | 40 | ASTM D93 |
| Viscosity at 40 °C, mm²/s | 1.3–2.4 | 1.9–4.1 | ASTM D445 |
| Distillation (90 % vol recovered), °C, max | 288 | 338 | ASTM D86 |
| Cloud Point, °C, max | Varies by region and seasona | ASTM D2500 | |
| Lubricity (HFRR wear scar), µm, max | 460 | 460 | ASTM D6079 |
| FAME Content, % vol, max | 5 | 5 | ASTM D7371 |
a Maximum cloud point is specified according to geographical zone and month (e.g., from –34 °C in northern winter to +2 °C in southern summer).
Additional Requirements
- Stability: Oxidation stability (ASTM D2274) and copper corrosion (ASTM D130) limits apply.
- Cleanliness: Limits for water and sediment content (ASTM D2709) and particulates are defined.
- Electrical Conductivity: Minimum conductivity levels are required to mitigate static discharge during fuel handling.
- Additives: Approved additives for cetane improvement, cold‑flow enhancement, and corrosion inhibition are permitted, but must not compromise exhaust after‑treatment devices.
Implementation Considerations for Fuel Suppliers
Producers and distributors must implement a robust quality management system to ensure that every batch of diesel fuel meets the standard at the point of delivery. Key operational aspects include:
- Blending Control: Refinery and terminal blending operations must be carefully adjusted to achieve the necessary balance of ignition quality, volatility, and density while remaining within sulfur and FAME limits.
- Cold‑Flow Performance: In northern regions, fuels are often treated with pour point depressants or blended with kerosene to meet the seasonal cloud‑point requirements.
- Sampling and Certification: Each batch should be tested in accordance with the methods referenced in the standard, and certificates of analysis must be retained for regulatory audits.
- Storage and Handling: Proper housekeeping to avoid contamination with gasoline, water, or biodiesel is essential. Compatibility with existing infrastructure (e.g., gaskets, seals) should be verified.
Tip: When operating diesel equipment in extremely cold environments, consult ASTM D975 or the local dealer for additional low‑temperature performance guidelines beyond the cloud‑point values specified in CAN CGSB 3.0 No. 142.0-2014.
Caution: The FAME content limit (5 % vol) is intended to maintain fuel stability and avoid clogging filters. Fuels with higher biodiesel content must conform to CAN/CGSB‑3.517 and may require engine modifications.
Compliance, Auditing, and Enforcement
Compliance with CAN CGSB 3.0 No. 142.0-2014 is mandatory in Canada. Environment and Climate Change Canada (ECCC) and Measurement Canada are the primary enforcement agencies. Regular market surveillance activities, including fuel sampling at retail sites, are conducted to verify conformity.
Penalties: Non‑compliance with sulfur limits or other specifications can lead to monetary fines, product recalls, and suspension of sale permits. Off‑road diesel must also satisfy the same ULSD requirements since 2012.
Reaffirmation: As of 2026, this standard remains current and is widely referenced in federal regulations such as the Sulfur in Diesel Fuel Regulations under the Canadian Environmental Protection Act.
Best Practice: Maintaining a comprehensive quality assurance program that includes regular third‑party testing helps fuel suppliers demonstrate due diligence and avoid costly compliance lapses.
Warning: Supplying diesel fuel with a sulfur content above 15 mg/kg can result in immediate engine damage to modern emissions systems and severe regulatory penalties. Always verify sulfur concentration before shipment.
Frequently Asked Questions
Q1: What is the difference between Grade 1-D and Grade 2-D under this standard?
A: Grade 1-D has a lower viscosity and distillation end‑point, making it more volatile and suitable for cold‑start conditions. Grade 2-D provides higher energy density and better fuel economy in normal operating conditions. Both grades must meet the same cetane number and sulfur limits.
A: Grade 1-D has a lower viscosity and distillation end‑point, making it more volatile and suitable for cold‑start conditions. Grade 2-D provides higher energy density and better fuel economy in normal operating conditions. Both grades must meet the same cetane number and sulfur limits.
Q2: Does CAN CGSB 3.0 No. 142.0-2014 cover biodiesel blends?
A: No. This standard applies only to neat diesel fuel and blends containing up to 5 % vol FAME. Higher biodiesel blends (e.g., B20) are covered by a separate CGSB standard (CAN/CGSB‑3.517).
A: No. This standard applies only to neat diesel fuel and blends containing up to 5 % vol FAME. Higher biodiesel blends (e.g., B20) are covered by a separate CGSB standard (CAN/CGSB‑3.517).
Q3: Are the cloud‑point limits fixed in the standard?
A: No. The standard references maximum cloud‑point values that vary by geographical region and month. These are defined in the standard’s tables based on prevailing winter temperatures, ranging from –34 °C in northern zones to –12 °C in southern regions.
A: No. The standard references maximum cloud‑point values that vary by geographical region and month. These are defined in the standard’s tables based on prevailing winter temperatures, ranging from –34 °C in northern zones to –12 °C in southern regions.
Q4: Is compliance with this standard legally required?
A: Yes. It is incorporated by reference into Canadian federal regulations. All diesel fuel sold for on‑road and off‑road use in Canada must meet the requirements of CAN CGSB 3.0 No. 142.0-2014.
A: Yes. It is incorporated by reference into Canadian federal regulations. All diesel fuel sold for on‑road and off‑road use in Canada must meet the requirements of CAN CGSB 3.0 No. 142.0-2014.
This article is prepared for informational purposes and reflects the standard as of 2026. Always consult the latest official version of CAN CGSB 3.0 No. 142.0-2014 for complete technical details.
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