Lead Replacement Petrol (LRP) versus unleaded: Older vehicles ran on leaded petrol or LRP. These vehicles were designed to use fuel with lead or an equivalent lubricant to coat the engine’s valve seats, thereby preventing wear. New cars have hardened valve seats that don’t need coating. Leaded fuel was banned as vehicles emitted toxic fumes, while new unleaded fuels burn cleaner.
Octane and Parts Per Million (PPM) explained: You’ll see 93 and 95 octane petrol for sale. The Octane or Research Octane Number (RON) value is any petrol’s ability to burn. The higher a fuel’s octane, the more it can burn and the more energy it releases. It’s important to note that most vehicles are designed to run on a specific octane to ensure optimal performance, so your car might not run better on 95 if it was designed to run on 93.
Diesel: On the diesel front, we’ve seen oil-burning vehicles advance to new efficiency highs with help from low sulphur diesel. The new generation diesels emit less harmful particulates and also contain a variety of environmentally friendly additives, which can improve performance, economy and longevity of modern engines.
PPM explained: You may see diesel for sale where it reads 500ppm and 50ppm and even 10ppm. In basic terms, the lower the parts per million (ppm) the cleaner the diesel is. High sulphur diesel causes particulate emissions and is one of the reasons you may see diesel cars puff out black smoke. The lower the ppm, the lower the emissions and the better for the environment.
Fuel additives: There are massive amounts of additives available that various manufactures use. These can be used to preserve the life of the fuel; some claim to clean the inside of the engine, boost vehicle performance and even make the fuel easier to transport.