When you wait to fuel up your vehicle at the pump, do you ever wonder if jumping from the regular unleaded to premium fuel will really make a difference? Depending on the type of vehicle you drive, you were likely instructed on the grade of fuel to use when you purchased the vehicle but, maybe you have never really given much thought to the other types that exist at your local refuelling station or their octane rating.
An octane rating is what measures the fuel’s ability to resist knocking or “pinging” during combustion, which is caused by the air and fuel mixture that detonates prematurely inside your engine. Generally, the higher the octane numbers the greater the fuel’s resistance to pinging during the combustion process.
USING THE RIGHT OCTANE MATTERS
You should always use the octane recommended by your vehicle’s manufacturer. Not all vehicles use the same octane, some may require Premium, while others can use Regular. Most vehicles are designed to run on 87 Octane, but others do require a higher grade depending on its engine.
Higher octane fuels are typically recommended for engines that have a higher combustion ratio or use super or turbo charge energy to force more air into the engine. If a higher octane is recommended for your vehicle, using it will boost performance and overall fuel economy.
When selecting the octane at the pump, here are a few things to keep in mind:
Don’t Use a Lower Grade Than Outlined in the User Manual
You may be tempted to use lower octane levels to save money at the pump. However, using that lower rated fuel can actually cause your vehicle’s engine to run poorly and could damage it, as well as its emission control systems over time. If your vehicle is new, using that lower octane could also void your manufacturer warranty. You will also notice a decrease in gas mileage and engine power. To get the most out of your vehicle, fill up using the recommended type of fuel. It is also recommended that you do research about a new vehicle before purchasing it to understand its requirements and the potential costs involved.
Using a Higher Than Recommended Grade
Sometimes, using a higher-Octane rating may improve gas mileage, but it depends on the vehicle. Higher octanes improve performance and can reduce carbon dioxide emissions during severe duty operations, such as towing. However, under normal driving conditions, it will do little to nothing for your vehicle. Rather than wasting your money with the hopes that your engine and exhaust system will function better, stick with the recommendations in your owners’ manual.
Consider the Cost
Higher octanes do cost more, but that is because the fuel components that boost the octane rating are more expensive to produce. If your vehicle requires mid-grade to premium gas, it is well worth the cost. Not only will you reduce how often you need to fill up, but you can also minimise costly repairs associated with using the wrong octane for your vehicle. To avoid engine repairs, consult owners’ manuals before filling up.
85 Octane
Some areas with a higher elevation may carry 85 octane at the pump, but modern petrol engines should not use it. 85 octane is ideal for older vehicles with carburettor engines not newer ones. Consider this when filling up and stick to the gasoline that is right for your vehicle.
Nelson Xavier Ssenyange @NelsonSsenyange
Team Leader
Germax Auto Spares & Garage @GermaxASGarage
0779250886/0752088734
