Royal Purple 0W-20 High Performance Synthetic Motor Oil - 5 Gallon

In this review the focus is on the Royal Purple 0W-20 high performance synthetic motor oil in a 5 gallon pail, and the bottom line is simple: this is a strong choice for owners who want long lasting protection and a modest fuel economy gain. The reviewer found it especially suited to modern gasoline engines where improved fuel efficiency and gentle treatment of emission systems matter. It is API and ILSAC GF-5 licensed and swaps into most service schedules without special procedures, which makes it practical for both DIYers and small fleets.

Key Features

• Better wear protection: Formulated with premium base oils and additives to reduce metal-to-metal wear and extend engine life under normal driving conditions.
• Increased fuel efficiency: The low viscosity SAE 0W-20 grade helps reduce internal friction, which customers reported as measurable mpg improvement.
• Emission system protection: Meets specifications to protect catalytic converters and other expensive emission hardware from premature damage.
• Fuel compatibility: Improved compatibility with fuels containing ethanol helps maintain stable lubrication in mixed-fuel environments.
• Corrosion resistance: Additives provide superior corrosion protection to help preserve engine components during storage and lower-use cycles.

Who It's For

The oil is best for owners of modern gasoline engines that call for SAE 0W-20 and who value engine longevity with a potential uptick in fuel economy. It suits high-mileage cars, commuter vehicles, and light fleet use where extended oil life and emissions protection are priorities.

It is less applicable for engines specifying a different viscosity, for some heavy diesel applications, or for those who must follow a unique manufacturer service oil requirement that excludes aftermarket formulations. If a vehicle requires a different spec, look elsewhere.

Pros & Cons

Pros

• Notable protection against wear, helping older engines feel smoother and quieter.
• Reported fuel economy gains and consistent performance with ethanol-blended fuels.
• API SN / ILSAC GF-5 and Dexos1 1 level licensing ensures broad compatibility and emission system safety.

Cons

• Packaged as a 5 gallon pail, which is ideal for frequent changers but may be bulky for single-car owners.

Specifications

Brand	Royal Purple
Viscosity Grade	SAE 0W-20
Volume	5 Gallon (640 Ounces)
Licensing	API SN, ILSAC GF-5, Dexos1 1
Recommended Use	Gasoline and compatible diesel engines
Key Benefits	Wear protection, fuel efficiency, emission system protection, ethanol fuel compatibility, corrosion protection

Our Verdict

The Royal Purple 0W-20 5 gallon pail is a sensible buy for drivers who change oil regularly, run modern gasoline engines, and want tangible wear protection plus a small fuel economy gain. It represents good value for those who need bulk oil and prioritizes engine and emissions hardware longevity.

Frequently Asked Questions

Can this oil be mixed with other motor oils?
Yes, Royal Purple is compatible with mineral and other synthetic oils, so a simple drain and refill or gradual transition is acceptable.

Is this suitable for diesel engines?
Royal Purple states compatibility with gasoline and diesel engines, but check the vehicle requirements; this product is primarily positioned for gasoline engines meeting API SN and Dexos1 1.

Do customers see real fuel economy improvements?
Customers commonly report about a 1 mpg improvement after switching, reflecting the product's low viscosity and reduced internal friction.