What is octane




















Our premium diesel expert dives into the benefits of using a quality diesel fuel throughout spring, summer and fall to ensure your equipment is operating in top condition. What octane ratings really mean for your car By: Akhtar Hussain Director of Refined Fuels Marketing, Refined Fuels in Fuel Efficiency Load up the snacks and crank up the tunes, because summer road trip season is officially here.

Summer trips mean long hours on the road hauling heavy gear. Towing loads like boats and campers can be especially taxing on the family car. Fuel grades like regular, plus and premium are dictated by their octane rating.

Through an easy-to-use digital platform, expert content leaders share their knowledge and facilitate conversations in convenient learning sessions. January 15, read. Each day, more than 30 million drivers pull up to a fuel dispenser to refill their vehicle, typically choosing from three types of fuel: regular, midgrade or premium.

With each fuel is a number that measures the level of octane in the gasoline. In most areas of the United States, regular unleaded gasoline is 87 octane, midgrade is 89 and premium is 91 to This value, known as the Anti-Knock Index AKI , is the primary indicator of octane in gasoline that consumers see on fuel dispensers. Many vehicle owners may not know how an internal combustion engine that runs on gasoline works, or why octane matters.

Consumer awareness of octane, however, can be the difference between a well-maintained vehicle engine or costly engine damage. Depending on a vehicle's engine design, octane plays a key role in engine performance and measures the ability to resist auto-ignition, which is commonly referred to as knock. As engine compression increases, so does the amount of power and efficiency generated by a given amount of fuel.

The higher the octane, the greater the fuel can withstand compression and resist knock. The air-fuel mixture is ignited with a spark during compression, and the resulting combustion releases heat energy that ultimately powers the vehicle. Knock can occur at a sufficiently high temperature a consequence of compression in the engine cylinders. In the United States, refineries have used a variety of methods to increase octane levels in gasoline.

Prior to , the primary and least expensive source of incremental octane was the additive tetra-ethyl lead TEL, or lead. Between , regular- and premium-grade gasoline had high octane ratings.

However, air- and soil-borne lead caused by vehicle emissions presented a significant risk to public health and the environment. Are you the proud owner of one or more motorcycles, ATVs or jet skis? Use a specially formulated octane booster called Octane Boost Motorsports. This product doubles the octane boost of the original formula to maximize power and acceleration. It also cleans the entire fuel system, including your fuel injectors.

Each bottle treats up to seven gallons of any gasoline blend, including ethanol. Ideally, you want to use an octane booster at every fill-up. To maximize the premium power and performance benefits of an octane booster, make sure you start using it a number of weeks before a racing or other special event. This allows the formulation to fully infiltrate the engine and fuel system to ensure a maximum gain. Search for: Search Now.

Login My Cart Toggle Dropdown. Back to Blog. These PRFs are used to bracket a given fuel sample to determine the pressure at which similar knock intensities are observed.

To determine the RON, the fuel is tested under engine idle conditions with a low air temperature and slow engine speed. To determine the MON the fuel is tested under the more stressful conditions of higher air temperature and engine speed. Current designs see image below allow the same engine to perform both tests.

Despite this flexibility, many testers still prefer to use more than one machine with each specifically set up and calibrated to perform either RON or MON tests. Gasoline explained. What is energy?

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