Petrol ULP 95/93 refers to unleaded petrol (ULP) with an octane rating of either 95 or 93. The octane rating, also known as the Research Octane Number (RON), measures the fuel's ability to resist 'knocking' or 'pinging' during combustion, caused by the air/fuel mixture detonating prematurely in the engine. ULP 95 and ULP 93 are common grades used in modern petrol engines, with the numbers indicating their respective resistance to knocking. Higher octane fuels generally offer better performance and efficiency, especially in engines designed to take advantage of the higher rating.

Whether you can use ULP 95 or ULP 93 in your vehicle depends on the manufacturer's recommendations. Most modern vehicles designed for unleaded petrol can run on both, but using a lower octane than recommended might lead to decreased performance and efficiency. Conversely, using a higher octane fuel than required usually doesn't offer significant benefits and could be more costly. It's always best to consult your vehicle's owner manual for the recommended octane rating.

Using a higher octane petrol, such as ULP 95, in engines designed for it can lead to improved fuel efficiency and engine performance. Higher octane fuels resist knocking more effectively, allowing for more advanced engine timing and higher compression ratios, which can enhance power output and operational efficiency. Additionally, it can help reduce engine wear and emissions in some circumstances.

The difference in fuel economy between ULP 95 and ULP 93 can be minimal in engines not specifically tuned to take advantage of the higher octane fuel. However, in high-performance engines designed for higher octane ratings, using ULP 95 can result in slightly better fuel economy and performance due to the optimized combustion process. For most standard engines, the choice between ULP 95 and ULP 93 should be based on manufacturer recommendations rather than fuel economy considerations.

ULP 95 and ULP 93 are both unleaded petrol grades, which means they are free from lead, a toxic substance that can harm the environment and human health. While the combustion of these fuels still produces carbon dioxide, a greenhouse gas, advancements in fuel technology and engine design have led to cleaner burning petrol engines with reduced emissions. Choosing the correct octane rating for your vehicle can also contribute to optimal engine performance and efficiency, potentially resulting in lower overall emissions.