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Quality Testing Requirements

What are the SGS Seal of Quality testing requirements?

SGS will perform testing for the below parameters, to ensure the quality of the fuel provided by each fuel station: 
  • Research octane number and motor octane number:
    Measures how well gasoline resists engine knocking, which can damage the engine 
  • Cetane number:
    Measures how easily diesel ignites. Higher numbers improve performance, reduce noise and emissions, and aid cold starts
  • Density:
    Denser fuel provides more energy, improving efficiency and engine power, while lower density reduces emissions but may increase fuel consumption. Deviation from the quality requirement may signal fuel contamination 
  • Sulfur content:
    Higher sulfur levels increase harmful emissions and reduce the efficiency of catalytic converters
  • Aromatic content:
    Refers to compounds like benzene in gasoline. High aromatic content affects both engine performance and environmental health, as these compounds can be harmful and are known carcinogens
  • Water:
    Water in fuel, often from poor storage or condensation, can cause corrosion, clog filters and damage the engine
  • Microbial contamination:
    Microbes in fuel can create deposits that clog filters and damage engines
  • Distillation:
    This shows how fuel evaporates at different temperatures, affecting engine start-up and emissions
  • Flash point in diesel:
    Used as a safety classification property. Lower flash point is usually caused by contamination with gasoline and poses a safety risk during operation and handling. It can cause higher combustion temperatures, potentially damaging the diesel particulate filter
  • Polycyclic aromatic hydrocarbons (PAHs):
    Harmful chemicals in diesel that can increase emissions, pose health risks and cause engine deposits if fuel quality standards are not met
  • Cold filter plugging point:
    Indicates the lowest temperature at which diesel can flow through a filter. Important for ensuring engine operation in cold conditions
  • Vapor pressure in gasoline:
    Needs to be adjusted for different seasons to keep fuel stable and efficient