Amsoil XL vs Royal Purple High Performance Motor Oil

AMSOIL has introduced a brand-new lubricant formulation in its XL Synthetic Motor Oil line. The new composition is able to outperform its predecessor in terms of cleaning power and extends the engine life, especially for today’s advanced automotive technology, such as turbochargers and direct injection.

AMSOIL XL Motor Oil is licensed by API to meet the criteria and it includes innovative detergents to protect critical engine parts such as pistons.

Royal Purple oils on the other side are cutting-edge synthetic oils designed to boost your vehicle’s performance.

They’re a global, well-respected brand. They use a combination of quality base oils and innovative additive technologies to assure the highest performance of the engine feasible.

Let’s compare the oil types of both:

Motor oil is a type of lubricant that is derived from crude oil and is used to grease, clean, and cool engines.

Types of motor oil consists of conventional synthetic, diesel bio-based, hybrid and full synthetic oils.

These oils are entirely synthetic, which means that no crude oil is used in their production.

Synthetic oil frequently outperforms traditional motor oil in terms of mechanical performance, including increased gas mileage and reduced engine wear at high temperatures.

Because of its complicated and sophisticated manufacturing process, it usually costs higher than the conventional motor oil.


The use of a 100 percent synthetic base stock is what distinguishes AMSOIL Signature Series and XL Motor oils.

The AMSOIL XL Series is a mid-range full synthetic motor oil line. The enhanced formulation provides increased cleaning power, superior wear control, high- and low-temperature protection, and extraordinary fuel efficiency.

AMSOIL XL is designed to work with cutting-edge automotive technology such as turbos and direct injection. It complies with the API SN (resource conserving), ACEA A5/B5, and ILSAC GF-5 standards.

The Royal Purple High Performance Series motor oil is a synthetic oil that has been uniquely designed to optimize efficiency and satisfy the requirements of high performance and modified motors.

Royal Purple High Performance motor oil

The High Performance Series is strongly suggested for automobiles that demand enhanced performance and greater protection.

High quality motor oil from Royal Purple delivers excellent protection and helps improve performance in petrol and diesel motors.

The current API is SN and it meets the criteria ILSAC GF-5 and Dexos1 1 performance parameters.

Things to know about the additives in these oils:

Motor oil’s basic task is to grease ones engine and reduce wear between working components. Even so, motor oil performs a number of other important tasks in the engine.

It prevents corrosion, removes residues, prevents sludge accumulation, and keeps the motor cool.

Oil additives are used to improve motor oil effectiveness because motor oil cannot do everything on its own. Motor oil cannot perform its necessary functions without any of the addition of additives.

Straight off the rack, many motor oil comprises about 15 to 30 percent oil additives.

Aftermarket oil supplements can also be used to improve the performance of the oil and the engine.

AMSOIL XL Synthetic Motor Oil has cleanser and dispersant additives.

The additive package it offers successfully increases the total base number (TBN), permitting it to nullify acids and resists sludge, corrosion, and carbon deposits.

XL has 25% more rinsing capacity to assist maintain the motor operating normally and for a prolonged period of time.

AMSOIL XL Motor Oil is well-matched with both conventional and synthetic engine oils.

Blending other oils with AMSOIL motor oils, on the other hand, will reduce the oil’s life expectancy and performance benefits.

Royal Purple synthetic oils outcompete any other lubricating oil, like other premium synthetic oils, thanks to the enhanced, proprietary Synerlec additive technology.

Such a unique mix, reinforced with a high level of zinc/phosphorus anti-wear additive and proprietary Synerlec additive technology, enhances the condition of metal-to-metal immediate contact under harsh circumstances for greater safety and resistance to corrosion.

How these oils affect Catalytic Converter?

AMSOIL XL Synthetic Motor Oil is compatible with today’s modern emissions control systems, supporting appropriate catalytic converter functioning for long operation life and reduced emissions.

The chemistry of XL Synthetic Motor Oil has been demonstrated to safeguard the engine against the detrimental impacts of low pre-ignition (LSPI).

The proprietary anti-wear additive technology used by Royal Purple reduces the negative consequences emission gases have on the catalytic converter.

Being used in a mechanically solid engine, the Royal Purple High Performance Series (HPS) engine oils will not disrupt the life of the catalytic converter or other emissions systems (ex. O2 sensors, etc.).

There is no fear of the catalytic converter degrading prematurely if the engine does not consume an excessive amount of engine oil.

When utilizing the HPS series oils, if large amounts of oil do not enter into the exhaust, a catalytic converter will not be poisoned.

Which is better in cleaning the engine?

Controlling the growth of heating in engines lowers the temperature of the oil, which also lowers the thickness of the oil.

This decreases the buildup of muck and coating on parts due to excessive heat, resulting in less horsepower loss and wear throughout the oil change drainage period.

AMSOIL XL Oils are designed to withstand thermal degradation while also protecting motors from the impacts of overheating.

Oil thickening and muck accumulation are prevented by reducing oil deterioration. AMSOIL XL ensures that all combustion elements are appropriately greased.

Detergent and dispersing additives have been included in AMSOIL XL Synthetic Motor Oil.

It is designed to be more resistant to sludge and carbon deposition than ordinary lubricants.

The enhanced additive bundle significantly improves the total base number (TBN) to neutralize acids while also resisting sludge, oxidation, and soot deposits. AMSOIL XL has 25% greater cleansing power than regular AMSOIL, making it possible for the engine to run smoothly and longer.

The additive technique used by Royal Purple prevents white sludge and lubrication scarcity that can happen with elevated concentration gasoline-ethanol mixtures.

The Advanced synthetic solvency helps to keep motors clean by reducing engine deposits.

Furthermore, it exhibits no rust and corrosion in standard manufacturing tests for various car markets, as well as North America and Europe.

The thick detergents are able to eliminate engine deposits and keep the engine clean, extending engine life.

Which provides better Oil burn-off Protection?

Oil burn-off or volatility occurs when temperature increases and oil gets hot, triggering evaporation of lighter molecules. This leads to increase in the viscosity of oil, emissions and maximum oil usage.

AMSOIL XL is a viscosity-varying formulation. It outshines conventional oils in terms of thermal breakdown resistance, which would include volatilization and viscosity diminishment, while remaining fluid in cold temperatures for smoother cold starts and faster startup flow.

With the addition of turbochargers to engines, the total heat in the engine has increased. Even in the harshest environments, XL Synthetic Motor Oil retains its fluidity (viscosity).

The GM Oxidation and Deposit (GMOD) Test involves running a 5.7L V8 engine for 100 hours at 293oF (100o hotter than normal). These harsh operating conditions put an oil’s capacity to regulate viscosity, deposits, and oil usage to the test.

The testing data presented the fact that AMSOIL XL Synthetic Motor Oil provides 64 percent more shielding against oil degradation than required by the GM dexos1 Gen 2 specification, therefore ensuring protection in extreme heat.

Royal Purple lubricants use a premium, high-retention, low-volatility variant of the ZDDP zinc and phosphorous anti-wear additive.

Because this type of the ZDDP additive does not evaporate readily, it remains in the oil, doing its function and safeguarding the engine.

Oil life is extended owing to its superior oxidation tolerance.

Royal Purple High Performance Series is far more durable at increased oil temperatures and reduces wear because it is highly saturated with molecules and free of contaminants.

The decreased volatility helps to reduce evaporative losses as well.

Which oil Minimizes Engine Wear-off?

AMSOIL XL series synthetic motor oil is able to form a thick fluid coating that separates metal faces, while its powerful anti-additives decrease wear in metal-to-metal contacting surfaces for longer motor life.

The impulsive combustion of the fuel/air blend before spark-triggered ignition is known as LSPI.

The majority of new engines use gasoline direct injection (GDI), which is frequently combined also with a turbocharger.

LSPI incidents, that can ruin pistons and connecting rods, are more likely as a result of these innovations.

Safeguarding the motor from LSPI requires the use of a correctly designed motor oil.

Original equipment manufacturers (OEMs) such as General Motors (GM) have dealt with the problem by developing tests to assess the effectiveness of a motor oil to avoid LSPI. AMSOIL XL Synthetic Motor Oil provided 100 percent protection against LSPI2 in five consecutive testing, with zero incidents.

AMSOIL XL protects against low-speed pre-ignition 100 percent, improves fuel efficiency, recovers power, and keeps pollutants low.

Elevated pressure causes the viscosity of Royal Purple HPS Series motor oil to rise.

Its sophisticated additive advancements, such as Synerlec, increase the efficacy of metal-to-metal contact during extreme circumstances, resulting in increased shielding.

It also helps to safeguard the motor by reducing heat and friction. Because of the high lift/high ramp rate camshafts, the Royal Purple HPS Series secures valve trains with roller or flat tappet lifters

Which offers better Engine Seal Protection?

The seals on the engine can stiffen and dehydrate with time, which is the most common source of oil leaks. Several gaskets and seals form an oil-tight seal between metal components in the motor.

Oil would seep out between components if it weren’t for the valve-cover gasket, crankshaft seals, oil-pan gasket, and other gaskets and seals, and dirt and other impurities would finish up within the engine.

It is important to use high-quality oil to keep seals and gaskets from drying out, shrinking, or becoming brittle.

They can begin to leak if you use a low-quality oil or don’t drive often enough to allow oil to circulate through the engine to condition seals and gaskets.

The synthetic motor oil from AMSOIL is completely compliant with contemporary seal materials and is specially prepared to service seals and keep them malleable to prevent leaking.

However, using alternative oils with AMSOIL motor oils will lower the oil’s average lifespan and efficiency benefits. Where oils have been combined, AMSOIL does not recommend prolonged drain periods.

The AMSOIL limited guarantee will be invalid if you combine other oils with AMSOIL motor oils.

Royal Purple High Performance oil improves the sealing in between piston ring and the cylinder wall, increasing horsepower and torque while lowering fuel consumption.

Seals can shrivel and leak over time; Royal Purple High Mileage lubricating oils reconditions seals, giving them a little expansion and elasticity.

Which oil offers Improved Fuel Economy?

Friction modifiers are used in AMSOIL XL Synthetic Motor Oil to prevent friction-related power losses.

When tried to compare to traditional, non-fuel-efficient engine oils, it offers improved fuel mileage. AMSOIL XL Synthetic Motor Oil is strongly recommended for all gasoline-powered vehicles.

The American Petroleum Institute (API) has certified that XL Synthetic Motor Oil meets and exceeds the specifications listed in most owner’s guides. It performs well in fuel economy assessment, therefore gaining the API’s “Resource Conserving” classification.

Royal Purple is an exclusive high-end motor oil. It has a lower ratio of friction, which means it saves you money on gas.

This makes it perfect for automobiles that are frequently stopped and started. It even go as far as to claim that it has the comparable fuel mileage as 5W-20 oils.

Viscosity differences:

The viscosity grade of a motor oil indicates how resistant the oil is to flowing in the motor.

A lubricant with a lower viscosity rating will be more fluid, liquid, and flow more freely in a vehicle.

In contrast, the bigger the grade, the thicker the oil, the slower it flows, allowing a protective coating to build on engine components.

AMSOIL XL is available in viscosity ratings of 0W-20 (XLZ), 5W-20 (XLM), 5W-30 (XLF), 10W-30 (XLT), and 10W-40 (XLO).

The viscosities available for Royal Purple HPS are 5W-20, 5W-30, 10W-30, 10W-40, and 20W-50.

Oil Change Frequency:

AMSOIL XL Synthetic Motor Oil is intended for gasoline-fueled cars with oil change periods of up to 12,000 miles per year, or longer where specified in owner’s guides or suggested by electronic oil life monitoring systems.

Regardless of the filter brand, change the oil filter at every oil change.

The interval for changing Royal Purple 5W-30 motor oil is the same: 12,000 miles or 12 months, whichever comes first. The time between oil changes is mostly determined by the car’s make and model.


In practically every aspect of performance, AMSOIL synthetic engine oils exceed conventional and other synthetic oils, including wear resistance, extreme high- and low-temperature performance, foaming management, viscosity preservation, rust and corrosion prevention, volatility, and fuel efficiency.

Other brands may perform well in certain of these domains, but AMSOIL synthetic motor oils regularly rank first in each category. AMSOIL synthetic motor oils deliver optimal performance and safety, giving drivers peace of mind.

Royal Purple can keep the engine cool and greased, as well as shield it from corrosion and be compatible with a wide range of ethanol-based fuels.

This API-licensed synthetic motor oil performs admirably in gasoline and diesel motors.

This is a high-quality synthetic motor oil that protects the car against metal-on-metal contact, erosion, keeps internal components cool, improves fuel economy, while protecting the catalytic exhaust system.