Kenya has extended the temporary adjustment of sulphur limits in petrol and diesel by a further six months in a move aimed at protecting the country from potential fuel shortages arising from disruptions in global petroleum supply chains.
In a press release dated November 11, 2026, Cabinet Secretary for Investments, Trade and Industry Lee Kinyanjui said the extension followed a request by the Ministry of Energy and Petroleum and a recommendation by the National Standards Council.
Under the extended arrangement, the maximum permissible sulphur content in both automotive gas oil (diesel) and premium motor spirit (petrol) will remain at 50 milligrams per kilogram (mg/kg), equivalent to 50 parts per million (ppm).
The adjustment applies to the standards KS EAS 177:2025 for automotive gas oil and KS EAS 158:2025 for premium motor spirit.
The government says the decision is intended to widen the range of fuel sources from which Kenya can import petroleum products at a time when geopolitical tensions in the Middle East continue to threaten international supply chains.
The disruptions include uncertainties surrounding the Strait of Hormuz, a strategic shipping route through which a significant proportion of the world's petroleum supplies passes.
Any disruption along the route could affect the movement of crude oil and refined petroleum products, potentially increasing shipping costs, insurance premiums and the risk of delayed deliveries to importing countries such as Kenya.
The sulphur limit is significant because Kenya has been working towards cleaner fuel standards, with the stricter 10ppm requirement introduced under the 2025 fuel specifications.
The latest decision effectively allows petrol and diesel containing up to 50ppm of sulphur to enter the Kenyan market during the temporary period.
Sulphur is a naturally occurring component of crude oil that remains in petroleum products after refining.
When fuel containing sulphur is burned in vehicle engines, it produces sulphur dioxide, a pollutant associated with respiratory illnesses and the formation of harmful particles in the atmosphere.
For motorists, the adjustment means that fuel meeting the temporary 50ppm threshold can be legally supplied and sold.
However, it does not mean that all fuel available at petrol stations will necessarily contain that amount of sulphur, since 50ppm is the maximum permitted concentration rather than a mandatory level.
The change also does not automatically translate into lower fuel prices or improved engine performance.
Retail pump prices are influenced by several other factors, including international petroleum prices, shipping costs, insurance, exchange rates and government taxes.
However, the higher sulphur allowance could have implications for vehicles fitted with modern emission-control systems, particularly diesel particulate filters and catalytic converters, which are designed to operate with cleaner fuels.
Prolonged exposure to higher-sulphur fuel can affect the efficiency and lifespan of some of these systems.
The environmental implications are also significant, particularly in urban centres such as Nairobi, where vehicle emissions contribute to air pollution.
Higher sulphur content can increase sulphur dioxide emissions, potentially undermining efforts to improve air quality and reduce pollution-related health risks.
The government maintains that the adjustment is a temporary measure intended to balance fuel availability with environmental and public health considerations.
It will be reviewed after six months or earlier if global petroleum supply conditions improve.
