New Oil Technology Required to Prevent Super Knock (LSPI)
A potentially disastrous problem is appearing in today's engines. Here's how AMSOIL is working to solve it.
What is LSPI?
LSPI, or Low-Speed Pre-Ignition, is a severe form of engine knock. Unlike traditional engine knock, which has been around since engines were created, LSPI occurs under low-speed, high-torque conditions typically found in turbocharged gasoline direct-injected (GDI) engines. It is more destructive than typical engine knock.
Under normal conditions, the ignition of the air-fuel mixture is precisely timed to work with the downward movement of the piston. LSPI, however, happens when an oil/fuel droplet hiding in the piston crevice releases into the combustion chamber and ignites the fuel/air mixture prematurely. This premature ignition creates a force that collides with the upward-moving piston, potentially causing significant engine damage, such as cracked pistons and broken connecting rods.
The Challenges of Modern Engines
Original equipment manufacturers (OEMs) have been downsizing engines to meet stringent fuel-economy and emission standards while simultaneously increasing power and torque. Most modern engines now feature a combination of turbochargers, direct-fuel injection, and variable valve timing. These advancements allow smaller engines to produce more power than their larger counterparts while offering improved fuel efficiency. However, these smaller, hotter-running engines pose significant challenges for lubricants. One of the latest challenges is LSPI, or "super knock," which can severely damage engine components.
The Role of Lubricants in Preventing LSPI
To mitigate LSPI, car manufacturers have programmed vehicle software to avoid conditions that induce LSPI. However, this approach often limits fuel efficiency. To maximize engine efficiency, OEMs are beginning to implement software updates that, while improving efficiency, also increase the risk of LSPI. After these updates, engines without motor oil specifically formulated to combat LSPI will be more susceptible to severe damage.
AMSOIL has been proactively addressing this issue. Demonstrating its commitment to protecting turbocharged direct-injected engines, AMSOIL achieved 100% protection against LSPI in the engine test required by the GM dexos1® Gen 2 specification. As a result, the entire AMSOIL motor oil lineup has been upgraded to meet these new challenges.
Testing and Validation
AMSOIL's motor oils undergo rigorous testing to ensure they meet and exceed industry standards. The company’s products have demonstrated exceptional performance in various tests, including those required by the GM dexos1® Gen 2 specification. This certification is a testament to AMSOIL's commitment to quality and innovation.
AMSOIL's Commitment to Combating LSPI
AMSOIL's dedication to innovation and engine protection is evident in its response to the LSPI challenge. By reformulating its entire motor oil lineup, AMSOIL ensures that its products provide the necessary protection for modern engines, especially those with turbocharged GDI systems. This proactive approach not only safeguards engines from LSPI but also enhances overall performance and longevity.
How AMSOIL Motor Oils Work
AMSOIL motor oils are engineered with advanced additives that prevent LSPI. These additives help reduce the likelihood of oil/fuel droplets igniting prematurely, thus protecting the engine's critical components. The formulation also includes detergents and dispersants that keep the engine clean and running efficiently.
Benefits of Using AMSOIL Motor Oils
- Enhanced Engine Protection: AMSOIL motor oils provide superior protection against LSPI, reducing the risk of engine damage.
- Improved Fuel Efficiency: By preventing LSPI, AMSOIL oils allow engines to operate more efficiently, leading to better fuel economy.
- Longer Engine Life: The advanced formulation of AMSOIL oils helps maintain engine cleanliness and reduce wear, extending the engine’s lifespan.
- Optimal Performance: AMSOIL motor oils are designed to perform under extreme conditions, ensuring that engines run smoothly and reliably.
Future-Proofing Your Engine
With OEMs continuously updating vehicle software to improve efficiency, the risk of LSPI is likely to increase. By choosing AMSOIL motor oils, drivers can future-proof their engines against these risks. AMSOIL's commitment to innovation and engine protection ensures that their products will continue to meet the evolving needs of modern engines.
LSPI is a serious issue that can cause significant engine damage, particularly in modern turbocharged GDI engines. AMSOIL has taken proactive steps to address this challenge by reformulating its entire motor oil lineup to provide 100% protection against LSPI. By choosing AMSOIL motor oils, drivers can protect their engines, improve fuel efficiency, and ensure optimal performance.
