Royal Purple 5W20 Synthetic Motor Oil Review 2024

Royal Purple 51520 High Performance Motor Oil 5W-20 (5QT)
  • Better wear protection
  • Increased fuel efficiency
  • Superior corrosion protection
  • Increased protection against LSPI
  • Improved compatibility with fuels containing ethanol
  • Better protection for vehicle exhaust emissions equipment

Royal Purple 5w20 full synthetic engine oil is made with a synthetic formula that makes it high-performing. It provides outstanding motor wear protection and expands the oil change intervals, thus, offering better fuel economy.

It is suitable for gasoline engines, including turbocharged, supercharged, passenger vehicles (like cars, SUVs, vans, trucks, and racing cars), and any gasoline-powered vehicles that need SAE 5W-20 oils.

It is a well-mixed formula of synthetic oils and specific additives that collaborate to provide the engine with the highest wear protection, increase fuel efficiency, and keep the engine’s internal parts clean.

Our Royal Purple 5w20 synthetic motor oil review comes from an in-depth analysis of the features of the oil and from real user feedback.

If you ask me it’s really an amazing oil to use. Because Royal Purple excels at blending high-performance motor oils and base oils to create something new and improved. 

This 5W-20 SAE oil has an advanced engine lubricant that is formulated by combining premium-base oils with exclusive additive technologies to optimize the engine’s performance.

It delivers superior engine protection and improves the performance of gasoline engines. Overall, it is designed to provide extended life, requiring less frequent changes and reducing overall maintenance costs.

Royal Purple SAE 5W20 Full Synthetic Engine Oil, 5 Qt.

Our Recommendation For
  • Nissan Armada
  • 2011 Mazda CX-9
  • 2016 Ram 1500
  • 2009 Honda Civic LX
  • 1998 Ford Taurus
  • 2006 Honda Ridgeline
  • 2012 Ford Fiesta SES
  • 2005 Dodge Ram Rumble Bee

Royal Purple Oil 5W20 Full Synthetic Specs

Brand Royal Purple
Type High Performance
Model 51520
Viscosity 5W-20
Weight 8 lbs
Quantity 5 Quart Bottle (4.73 L)
Exceptional Startup Protection Yes
Sludge/Varnish Protection Yes
LSPI Protection Yes
Increased HP Yes
Higher Fuel-Efficiency Yes
Enhanced Additives Yes
Superior Corrosion Protection Yes
Temperature Higher Protection In Both Cold And Heat
License API-Licensed
Dexos1 Approved
Certification Meets ILSAC GF-6 Requirements
Engine Type For Gasoline Engines
Vehicles Hardworking Cars, Trucks, SUVs
Our Recommendation For Nissan Armada, 2011 Mazda CX-9, 2016 Ram 1500, 2009 Honda Civic LX, 1998 Ford Taurus, 2006 Honda Ridgeline, 2012 Ford Fiesta SES, 2005 Dodge Ram Rumble Bee
Our Rating 8.0

Detailed Royal Purple 5W20 Review

Royal Purple produces superior-quality lubricants, and using extra additives allows for truly amazing lubricants. They come in different viscosity gradings such as 0w-20, this 5w20, 5w30, and others for different types of vehicles.

It forms a solid and slippery synthetic layer on all metal surfaces. The blend significantly improves lubrication by increasing the oil’s thickness and strength, which helps prevent metal-to-metal contact.

Maximum wear protection

The Royal Purple 5w20 oil includes a very high resistance formula for an exceptional reduction in engine wear and a noticeable temperature decrease to increase the engine’s life.

The oil offers better sealing between the piston ring, and the cylinder wall optimizes power and torque, saving fuel and keeping the engine protected. 

In addition, the conditions hardened seals protect against leaks, and the high alkalinity minimizes the corrosive wear.

Better LSI Protection

The synthetic oil and additive blend help reduce the Low-Speed Pre-Ignition in turbocharged gasoline engines. That’s why the Royal Purple 5w20 oil is suitable for heavy-duty and high-speed vehicles. 

Superior Cleanliness 

The advanced synthetic solvent capacity reduces deposits in the engine and keeps it clean. This oil protects the tappets of roller or flat (roller or flat tappet) valves that require more protection due to the high-speed lifting camshafts. 

Better Fuel Efficiency

The friction low coefficient works to extend the oil drains and requires fewer oil changes over time. This saves your time, and money and reduces the impact on the environment.

Besides, the oil easily withstands harsh heat or cold temperatures, extending its shelf life.  

Meets the Standards

The Royal Purple oil is licensed by the American Institute of (API), International Lubricants Approval, Standardization Committee (ILSAC), and approved by the GM Dexos1 for gasoline engine oil.


The oil’s Patented additive technology prevents the starvation of lubrication and white sludge, which happens with a high concentration of gasoline-ethanol blends. It is fully compatible with other synthetic oils, or fuels with ethanol.

However, to get the best results, Royal Purple recommends you wait until the manufacturer’s first scheduled oil change in new gasoline engines before switching to Royal Purple.

In case, you can use the Royal purple oil filter for your car when you’re changing from another brand of oil.

  • Improved fuel efficiency (saves fuel)
  • Most suitable 5w20 synthetic oil for Hemi
  • Offers maximum corrosion resistance
  • Reduces the engine’s emissions and noise level
  • Fully compatible with fuels that contain ethanols
  • Increases the power, torque, and valve train protection
  • Outstanding engine wear protection (and startup protection)
  • Pricey
  • Packaging is not the best
  • Not suitable for diesel engines

Royal Purple 51520 Synthetic Motor Oil Alternatives

This oil is a perfect fit for drivers and users who are looking for engine oil that offers outstanding protection and better performance to withstand harsh driving conditions, including high speeds and hot/cold temperatures. 

That said, you might think that this specific oil is not the best fit for the engine. Thus, using a good alternative could be the best solution, and here are the top oils to consider:

Amazon Basics Full Synthetic Motor Oil, 5W-20, 5 Quart

The Amazon Basics 5w-20 engine oil is a good quality oil that fits the bell well. It has a performing formula that gets the job done at an affordable price.

It is made for longer oil-change intervals, which means a better fuel economy. It covers the engine with a thick oily layer that boosts the engine for an immediate move during cold temperatures.

Mobil 1 Extended Performance Full Synthetic Motor Oil 5W-20, 5 Quart

Our Recommendation For
  • Toyota
  • Corolla 98
  • FJ Cruiser
  • C8 Corvette
  • Honda Pilot
  • Mercedes E500
  • Chevy Silverados
  • 2010 Infiniti QX56
  • 2013 Toyota Tundra
  • 2008 Range Rover Sport

The Mobile 1 5w-20 synthetic motor oil is also a perfect fit for drivers who are looking for the utmost engine protection. The best part about this oil is that it serves for more miles than the Royal purple, which goes up to 20,000 miles.

This oil’s advanced formula offers the engine 20 times more protection and removes the sludge to keep it as clean as possible. Thus, expanding the engine’s service life.

Castrol 03063 GTX MAGNATEC 5W-20 Full Synthetic Motor Oil, Green, 5 Quart

Our Recommendation For
  • Honda Civic
  • Honda Odyssey
  • 2005 Acura RSX
  • Hyundai Elantra
  • Modern Ford Engines
  • 2011 Ram 1500 5.7 Hemi

The Castrol synthetic engine oil is a well-known oil that provides wear protection 6 times more, making it a suitable choice for severe driving conditions.

The oil formula contains intelligent molecules that go down and beyond to cover the engines’ parts, even the tighter ones…

Offering a high protection layer that keeps the engine well-performing regardless of the driving situation’s temperature.

My Final Verdict To You

The Royal Purple 5W20 because of its included addictives, offers an outstanding performance that boosts the engine’s fuel and keeps the vehicle’s engine at its highest version.

This highly-rated oil keeps the gasoline engines working perfectly in any driving conditions, including hot and cold climates.

It offers the vehicle’s engine better wear protection than its competitors, which results in higher fuel efficiency and a better user experience.

5W20 Royal Purple Oil FAQs

Q: Is Royal Purple 5W20 Discontinued?

Ans: No, the Royal Purple 5w20 oil is available and is more popular among mechanics and car owners. It’s available on both Amazon and Walmart as well.

Q: Is This Royal Purple Oil 100% Synthetic?

Ans: Yes, the Royal Purple 5w20 oil is synthetic and combines premium oils with an addictive technology that enhances its performance and makes it a well-performing oil for most types of gasoline engines and cars.

Q: Royal Purple Full Synthetic 5W20 Change Intervals?

Ans: The recommended oil-change interval with Royal Purple is around 12,000 miles or 12 months period. Make sure to go through the engine’s manufacturer manual and follow the instructions properly to get the best results. Otherwise, the vehicle’s engine will not be high-performing.

Q: How To Pour Engine Oil In Car?

Ans: To make pouring out the oil easy for you, you can use a threaded oil filler funnel. However, if you feel that the bottle is heavy, you can choose the 1-quart plastic bottle option.

Q: Is Royal Purple Better Than Mobil 1?

Ans: If you compare the two kinds of oils based on their protection performance, they are both highly-performing oils that work for harsh driving conditions all year-round. However, the Mobile 1 oil works for more miles than the Royal Purple oil.

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