
VP Racing MR12 is a leaded race fuel designed for 4-stroke motocross engines. It is available in a 5-gallon (19-litre) drum and has a research octane number (RON) of 101. The fuel has been shown to increase power by up to 6% when compared to other race fuels. It is suitable for engines that can tolerate lower octane values.
Explore related products
What You'll Learn

MR12 is a leaded race fuel
This fuel is designed to deliver maximum power and performance for four-stroke engines. It has a Research Octane Number (RON) of 101 and a Motor Octane Number (MON) of 85, resulting in an average of 93. The specific gravity of MR12 is 0.7340, and it is oxygenated. The Reid Vapour Pressure (RVP) is specified as 12.17 psi.
MR12 is available in 5-gallon pails or 6-gallon cases, with a California warning for reproductive harm on its packaging. The colour of the fuel is green. The price for a 5-gallon pail is $240, while a 5-gallon pour spout accessory costs $21.99.
Due to regulations from the federal government's Environmental Protection Agency (EPA), a surcharge is assessed by the fuel shipper and included in the shipping charges for each case of fuel ordered.
Gel Fuel: Affordable, Efficient, and Cost-Effective
You may want to see also
Explore related products

It's designed for 4-stroke motocross engines
MR12 is a type of fuel designed for four-stroke motocross engines. It is produced by VP Racing Fuels and is intended to make maximum power in four-stroke dirt or street bikes with stock or mild modifications. MR12 is VP's best fuel for four-stroke applications that can tolerate lower octane values. It has a low octane rating of 93 and is oxygenated, which means it contains more oxygen than pump gas. This fuel is ideal for four-stroke engines as it delivers up to 5% more horsepower.
MR12 fuel is available in 5-gallon containers and 19-litre packages. It has met the fuel rules for various racing organizations, including AMA Pro/Am, CCS, WERA, NMA, WORCS, SCORE, and Best in the Desert, making it a popular choice for motocross racing.
While MR12 is an excellent fuel for four-stroke motocross engines, it is important to note that it is not legal for AMA Pro racing due to its oxygen content. However, it is suitable for club-level racing and other forms of competition, such as CCS, WERA, and NMA racing.
MR12's leaded, oxygenated formula makes it a unique fuel option for four-stroke motocross engines. Its low octane rating and increased oxygen content set it apart from other fuels, making it a top choice for racers looking to maximize power and performance in their four-stroke dirt or street bikes.
Shipping's Dirty Secret: Heavy Fuel Oil Emissions
You may want to see also
Explore related products

It has a lower octane rating
MR12 is a type of fuel designed for four-stroke dirt or street bikes with stock or mild modifications. It is produced by VP Racing Fuels and is marketed as their best fuel yet for four-stroke applications that can tolerate lower octane values.
Octane ratings are measures of fuel stability. The higher the octane rating, the more stable the fuel. The octane rating is defined by the pressure at which a fuel will spontaneously combust (auto-ignite) in a testing engine. The benefit of higher-octane rating fuel is that the mixture of fuel and air that is injected into the cylinder can be compressed more before it is ignited, which leads generally to a more efficient combustion.
MR12 has a lower octane rating, meaning it has a lower resistance to premature ignition, also known as "knocking". Knocking occurs when the rising temperature and pressure from the primary combustion cause unburned fuel to ignite, resulting in an uncontrolled secondary combustion that causes a spike in cylinder pressure. Modern engine computers can minimize this condition by controlling the timing of valves and fuel injection, although this control mechanism can also come with a fuel efficiency or emissions penalty.
While MR12 has a lower octane rating, it is still suitable for four-stroke engines that can tolerate lower octane values. It is important to use the correct type of fuel for your vehicle, as using a higher octane fuel than necessary can result in wasted money, and using a lower octane fuel can cause engine knocking and reduced performance.
Understanding the Fuel Consumption of a 757 Jet
You may want to see also
Explore related products

It's ideal for motocross use
MR12 racing fuel is a blend of high-quality components, offering a range of benefits that make it ideal for motocross use. Motocross is a demanding sport that requires a fuel that can provide both high performance and reliability, and MR12 delivers on both fronts.
The fuel's high octane rating helps to prevent engine knock and improves throttle response, resulting in smoother and more responsive performance. This is crucial in motocross, where quick reactions and precise control are essential for navigating challenging terrain and competing at high levels. MR12's clean-burning properties also contribute to reduced carbon buildup, ensuring reliable performance and minimizing the need for frequent engine maintenance, which is critical for motocross riders who depend on their bikes' consistent performance.
Additionally, MR12 fuel's composition is designed to provide exceptional power and acceleration, enhancing the riding experience and enabling motocross riders to tackle various track conditions effectively. The fuel's ability to burn efficiently and deliver a consistent performance output ensures that riders can confidently push their limits and focus on refining their skills and techniques.
MR12's versatility also makes it a popular choice for motocross enthusiasts. It is suitable for use in both 2-stroke and 4-stroke engines, providing flexibility and convenience for riders with different bike preferences. This versatility, combined with its performance and reliability advantages, makes MR12 racing fuel a top choice for motocross competitors and hobbyists alike.
In conclusion, MR12 racing fuel's unique blend of performance-enhancing and reliability-improving characteristics makes it ideal for motocross use. Its ability to deliver smooth, responsive power, coupled with its clean-burning nature and versatility across engine types, ensures that riders can rely on consistent and exceptional performance, allowing them to focus on perfecting their riding skills and achieving their racing goals.
Aircraft Fuel: Gallon Weight and Why It Matters
You may want to see also
Explore related products

It's comparable to 93 octane pump gas in the US
MR12 is a type of fuel designed for four-stroke dirt or street bikes with stock or mild modifications. It is produced by VP Racing Fuels and is intended to make maximum power in these vehicles. MR12 is comparable to 93 octane pump gas in the US, which is considered a premium grade of gasoline.
Gasoline with a higher octane rating is more stable and less likely to ignite under pressure. This type of fuel is often required for sports cars and high-performance vehicles, as their engines put more pressure on the gasoline before lighting it up. If the gasoline explodes too early, it can cause "knocking," which can damage the engine and impact the performance of the car.
The octane rating of gasoline is determined through testing under different engine conditions. The research octane number (RON) is measured under engine idle conditions with a low air temperature and slow engine speed, while the motor octane number (MON) is tested under more stressful conditions with higher temperatures and engine speeds. The final octane rating is the average of these two values, often displayed as (R+M)/2 on the gasoline pump label.
While 93 octane gasoline is widely available in the US, it may not be offered at all gas stations. Some stations offer gasoline with higher octane ratings, such as "super" or "super premium," which can be used as substitutes in states or areas where 93 octane is not available.
Fuel Pump Replacement Cost for Suzuki Forenza
You may want to see also
Frequently asked questions
MR12 is a leaded race fuel designed for 4-stroke motocross engines or 4-stroke dirt or street bikes that can tolerate lower octane values.
Dyno tests have shown that MR12 fuel can provide up to a 6% increase in power compared to other similar race fuels.
MR12 fuel has a research octane number (RON) of 101 and a motor octane number (MON) of 85.
MR12 fuel is typically sold in 5-gallon 19-litre containers or drums. Some retailers may offer it in 6-gallon cases as well.










































