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Can Your Motor Oil Handle the Seven Responsibilities of a Lubricant?

Written by Charleen

Can Your Motor Oil Handle the Seven Responsibilities of a Lubricant?

Ed Newman|

Most motorists understand the primary functions of motor oil: reduce friction and wear. However, motor oil and other lubricants must do more to protect your vehicles and equipment. With engines and equipment becoming more powerful and sophisticated, it takes a properly formulated, well-balanced lubricant to carry out these seven critical functions.


• Minimize Friction

Lubricants reduce contact between components, minimizing friction and wear.

• Clean

Lubricants maintain internal cleanliness by suspending contaminants within the fluid or by preventing the contaminants from adhering to components. Base oils possess a varying degree of solvency that assists in maintaining internal cleanliness. Solvency is the ability of a fluid to dissolve a solid, liquid or gas. While the solvency of the oil is important, detergents and dispersants play a key role. Detergents are additives that prevent contaminants from adhering to components, especially hot components such as pistons or piston rings. Dispersants are additives that keep contaminants suspended in the fluid. Dispersants act as a solvent, helping the oil maintain cleanliness and prevent sludge formation.

• Cool

Reducing friction minimizes heat in moving parts, which lowers the overall operating temperature of the equipment. Lubricants also absorb heat from contact surface areas and transport it to a location to be safely dispersed, such as the oil sump. Heat-transfer ability tends to be a trait of the base oil’s thickness – lighter oils tend to transfer heat more readily.

• Seal

Lubricants act as a dynamic seal in locations like piston rings and cylinder contact areas to prevent contamination.

• Dampen Shock

A lubricant can cushion the blow of mechanical shock. A highly functional lubricant film can resist rupture and absorb and disperse these energy spikes over a broad contact area. As the mechanical shock to components is dampened, wear and damaging forces are minimized, extending the component’s overall operating life.

• Protect

A lubricant must have the ability to prevent or minimize internal component corrosion. Lubricants accomplish this either by chemically neutralizing corrosive products or by forming a barrier between the components and the corrosive material.

• Transfer Energy

Because lubricants are incompressible, they can act as an energy-transfer medium, such as in hydraulic equipment or valve lifters in an automotive engine.

Lubricants do far more than simply protect against wear. High-quality lubricants – like AMSOIL synthetic lubricants – are formulated to excel in each of these critical areas, ensuring you get the most out of your vehicles and equipment.

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New Motor Oil Specs are Coming

Written by Charleen

New Motor Oil Specs are Coming

Josh Kimmes|

As engine operating conditions grow more severe, so do the demands placed on your motor oil. New engine hardware such as turbochargers, direct injection and variable valve timing (VVT) place increased stress on your engine oil. You may find yourself asking, why do we need new engine hardware? What’s wrong with the tried-and-true equipment that has worked for years?

Well, automakers need every fuel economy gain under the sun they can get to meet tightening fuel-economy standards. And these new technologies help them get there.

More strict CAFE standards

The current corporate average fuel economy (CAFE) standard requires a fleet-wide average of 54.5 mpg by 2025 in the United States, a five percent annual improvement. These requirements have spurred the automotive industry to turn to the hardware mentioned above to build smaller, more fuel-efficient engines. In fact, by 2020, industry experts predict that almost every new vehicle will feature direct-injection technology (GDI). The vast majority will also be turbocharged (TGDI).

All upside, right?

Smaller, more-efficient engines that make the power and torque of their higher-displacement counterparts is all upside, right? In theory, maybe. But, in reality, today’s advanced engines undergo more severe operating conditions that can lead to…

  • Severe engine knock, also called low-speed pre-ignition (LSPI)
  • Increased engine temperatures
  • Compromised fuel injectors
  • Increased wear and deposits if the oil isn’t up to snuff

The biggest motor-oil-related challenge on the horizon is LSPI, also known as severe engine knock. LSPI can destroy pistons and connecting rods.

What is LSPI?

LSPI is the spontaneous ignition of the fuel/air mixture before spark-triggered ignition. It is another version of pre-ignition. Pre-ignition (engine knock) has been around since the beginning of internal combustion engines. LSPI, however, occurs under low-speed, high-torque conditions in TGDI engines, such as when taking off from a stoplight. This scenario can create conditions where the fuel/air ignites too early in the combustion cycle, throwing off the engine’s timing. The expanding combustion charge collides with the piston as it’s moving up the cylinder, potentially destroying the pistons or connecting rods.

How Does LSPI Occur?

Experts suggest the cause is due in part to oil/fuel droplets or deposits in the cylinder auto-igniting randomly. The droplets and deposits contain enough heat to ignite the air/fuel mixture before the spark-triggered ignition. This means oil formulation can play a role in reducing LSPI.

Testing has shown that certain motor oil ingredients can promote LSPI, while others can help reduce it. It’s tempting to think, “Well, dump a bunch of ingredients into your formulations that help reduce LSPI!” But some ingredients that help reduce LSPI have been limited over the years in motor oil formulations for other reasons.

It truly is a scientific balancing act confronting us oil formulators. It’s no easy task to formulate motor oils that deliver excellent wear protection, resist the increased heat of turbocharged engines, prevent deposits, act as a hydraulic fluid and, now, combat LSPI. The performance of the entire formulation – not just one or two ingredients – is what counts.

Coming Soon: New Oil Specifications

Difficult or not, next-generation motor oils will need to fight LSPI. In fact, they’ll need to pass an LSPI test to meet the new API SP and ILSAC GF-6 performance specifications set to take effect in mid-2019. General Motors is ahead of the game and requires oils to pass its own LSPI test. Its updated GM dexos1 specification (known as dexos1 Gen 2) is scheduled to take effect Aug. 31, 2017. The table explains the specs in a little more detail.

Relax…for now

For now, you don’t have to worry too much about LSPI. Your vehicle’s computer is programmed to avoid operating conditions that lead to LSPI. But, operating your engine under those conditions does promise fuel economy gains. And, once oils hit the market that combat LSPI, you can bet the vehicle manufacturers will reprogram their vehicles to take advantage in their never-ending quest for better fuel economy.

AMSOIL Prepared for the Change

We’ve been hard at work reformulating Signature Series Synthetic Motor Oil, XL Synthetic Motor Oil and OE Synthetic Motor Oil to address LSPI. The early signs are exciting. Experimental formulations of AMSOIL synthetic motor oils provided 100 percent protection against LSPI in turbocharged direct-injected engines.* Expect to see them hit the market in the months ahead.

Check out this page to learn more about LSPI.

*Based on the engine test required for GM dexos1 Gen2 specification.

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