Sasol Launches Ultra-Low Sulphur 10ppm Diesel in the Western Cape Ahead of Regulatory Deadline

What Is 10ppm Diesel and Why Does It Matter?

The 10ppm diesel, marketed by Sasol as Turbodiesel ULS 10ppm, contains no more than 10 parts per million of sulphur. This represents a significant reduction in sulphur content compared to the previous 50ppm standard. The lower sulphur levels are designed to support modern diesel engine technology, especially those featuring diesel particulate filters (DPFs) and advanced exhaust after-treatment systems. These systems can be sensitive to high sulphur content, making cleaner fuels essential for optimal performance and reduced maintenance.

Cleaner Fuels Two Regulations: Raising the Bar

The rollout of 10ppm diesel is ahead of the CF2 implementation date, which on 1 July 2027 will mandate that both petrol and diesel sold in South Africa contain no more than 10ppm sulphur. Currently, many vehicles still use 50ppm diesel, while 500ppm diesel remains available largely for older vehicles and commercial use.

CF2 also requires strict limits on hazardous fuel compounds, such as keeping benzene below 1% and aromatics under 35%, to further reduce harmful emissions. These measures are part of broader efforts to align South Africa’s fuel standards with those of the United States and Europe.

Environmental and Health Considerations

Reducing sulphur in diesel has notable environmental benefits. High-sulphur diesel contributes to the emission of nitrogen oxides and fine particles, which can harm air quality and pose risks to respiratory health. The CF2 standard aims to curb these risks significantly.

Cleaner fuel not only helps protect public health but also enables car manufacturers to bring in new technology models designed around lower emission standards.

The Evolution of Low-Sulphur Fuel Standards

The journey to 10ppm diesel has seen several delays. The original CF2 implementation was scheduled for 2017 and then postponed to 2023 before the current 2027 deadline. Despite these setbacks, Sasol has pressed ahead with massive investments in refinery upgrades, highlighting the company’s role in supporting cleaner fuels at a time when South Africa’s refining capacity is declining and import reliance is on the rise.

Which Diesel Is Right for Your Vehicle?

• 500ppm Diesel: The most affordable option, suitable for older, basic diesel engines. However, it produces more particulates, can cause sulphuric acid build-up in engines, and is unsuitable for engines with DPFs and advanced emission systems.
• 50ppm Diesel: Widely available and accepted by most vehicles. However, it’s not ideal for the latest engine designs; some modern models are not sold locally due to fuel quality concerns.
• 10ppm Diesel: Optimal for vehicles equipped with DPF and Selective Catalytic Reduction (SCR) technology, delivering fewer emissions and reducing acid corrosion. Though more expensive, it supports engines built after 2007 and aligns with the direction of future fuel standards.

Recommended Use Based on Engine Type

If you drive a newer diesel vehicle with a DPF and catalytic converter, 10ppm diesel will deliver the best performance and longevity. For older, mechanically simpler engines, 50ppm remains a viable choice, although the use of 10ppm will soon become standard practice everywhere following the new regulations.

Transitioning to Cleaner Choices

Price remains a consideration as diesel costs have been volatile, with factors such as international conflicts affecting local pump prices. While 10ppm diesel may be pricier per litre, the long-term benefits for engine health, environmental quality, and compliance with upcoming regulations may justify the investment for many drivers.

Looking to 2027 and Beyond

From July 2027, all diesel sold at local forecourts must meet the 10ppm sulphur standard, meaning that cleaner diesel will be the new norm across South Africa. While the shift brings new options to the fore today, it also sets the stage for a nationwide transition that prioritises cleaner air and modern vehicle technology.

The expansion of Sasol’s 10ppm diesel network in the Western Cape marks a move towards a healthier environment, improved vehicle performance, and the wider adoption of cutting-edge diesel technologies.