When filling up your car in South Africa, you may have noticed that there are different types of petrol available, specifically 93 and 95-octane ratings. But what do these numbers mean, and how do they affect your vehicle? We break it down in simple terms.

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The numbers 93 and 95 simply refer to the fuel's octane rating. Octane ratings measure a fuel's ability to resist knocking or pinging during combustion, which can damage your engine. The higher the octane number, the more compression the fuel can withstand before igniting. This is important for high-performance engines, which tend to require higher octane fuel. 

Most standard vehicles in South Africa are designed to run on 93-octane petrol. This type of fuel is suitable for everyday driving and provides adequate performance for most cars. However, some high-performance or luxury vehicles are designed to run on 95-octane petrol. Using 95 in these cars can enhance engine efficiency and performance, allowing for smoother acceleration and better fuel economy. One of the most noticeable differences between the two fuels is the price. Generally, 95 octane petrol is more expensive than 93. If your car’s manufacturer recommends 93 octanes, using 95 might not provide a significant benefit to justify the extra cost. However, if your vehicle requires 95 octane, using 93 could lead to engine knocking and potentially expensive repairs.

Both 93 and 95 petrol are unleaded, meaning they don’t contain lead, which is harmful to the environment. However, higher octane fuels like 95 can burn more efficiently, potentially producing fewer emissions. This can make a small difference in your vehicle's environmental impact, but it is just one factor among many.

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Before deciding which petrol to use, it’s essential to check your vehicle’s manual or consult with your mechanic. If your car is designed for 93 octane, that’s the best choice for you. If it requires 95, stick to that for optimal performance.

Mpho Mahlangu, in association with 

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