Royal Purple HPS 20W-50 Synthetic High Performance Street Motor Oil | 1 Quart | High Zinc/Phosphorus Anti-Wear | Synerlec Additive Technology | Gasoline & Diesel Engines

Royal Purple HPS (High Performance Street) 20W-50 Synthetic Motor Oil is a premium full-synthetic motor oil formulated with a high level of zinc/phosphorus anti-wear additive and a generous dose of Royal Purple's proprietary Synerlec additive technology — a unique formulation that enables HPS oils to outperform leading synthetic and conventional lubricants in both gasoline and diesel engines. The 20W-50 viscosity grade is a high-viscosity specification correct for high-performance engines, high-temperature operating environments, older and high-mileage engines, and applications where the engine manufacturer specifies a 20W-50 viscosity grade. Royal Purple HPS is the correct motor oil choice for performance enthusiasts who want a premium full-synthetic oil with elevated anti-wear protection beyond what standard synthetic motor oils provide. Sold as a single 1-quart bottle — case quantity is 6 quarts.

Key Features:

• High zinc/phosphorus anti-wear additive — Royal Purple HPS is fortified with a high level of zinc/phosphorus (ZDDP) anti-wear additive — elevated ZDDP levels provide superior protection for flat-tappet camshafts, high-lift roller cams, and other high-load valve train components that require higher anti-wear protection than modern low-ZDDP motor oils provide
• Royal Purple Synerlec additive technology — Royal Purple's proprietary Synerlec additive technology is a unique formulation that enables HPS oils to outperform leading synthetic and conventional lubricants — improved film strength, reduced friction, and superior protection across a wide range of operating conditions
• Full synthetic formulation — premium full-synthetic base oil provides superior thermal stability, oxidation resistance, and low-temperature flow compared to conventional and semi-synthetic motor oils
• 20W-50 viscosity grade — high-viscosity specification correct for high-performance engines, high-temperature operating environments, older and high-mileage engines, and applications where the engine manufacturer specifies a 20W-50 viscosity grade
• Gasoline and diesel compatible — correct for use in both gasoline and diesel engines — verify your specific engine's oil specification before use
• Outperforms leading synthetics — Royal Purple's HPS formulation is engineered to outperform leading synthetic and conventional lubricants in both gasoline and diesel engines
• Royal Purple quality — manufactured by Royal Purple, one of the most respected performance lubricant brands in North America

20W-50 Viscosity — Application Context:

The 20W-50 viscosity grade is a high-viscosity motor oil specification. The "20W" cold-weather rating indicates the oil's flow characteristics at low temperatures, while the "50" indicates the oil's viscosity at operating temperature. 20W-50 is a thicker oil at operating temperature than more common grades like 5W-30 or 10W-40 — correct for the following applications:

• High-performance engines: High-output engines generating significant heat benefit from the thicker 50-weight film at operating temperature — maintaining oil pressure and film thickness under high-load, high-temperature conditions
• High-temperature environments: Track use, hot climates, and sustained high-RPM operation where oil temperatures are elevated beyond normal street driving conditions
• Older and high-mileage engines: Engines with increased bearing clearances benefit from the thicker 50-weight viscosity for maintaining oil pressure and film thickness at operating temperature
• Flat-tappet camshaft engines: Classic and vintage engines with flat-tappet camshafts require elevated ZDDP levels for correct cam lobe and lifter protection — Royal Purple HPS's high zinc/phosphorus content makes it the correct choice for these applications

Verify your specific engine manufacturer's oil viscosity specification before use — 20W-50 is not correct for all engines.

Specifications:

• Brand: Royal Purple
• Part Number: RLP36250
• Barcode: 36250
• Product Line: HPS (High Performance Street)
• Viscosity Grade: 20W-50
• Base Oil: Full synthetic
• Volume: 1 quart (946 mL)
• Case Quantity: 6 quarts per case
• Engine Compatibility: Gasoline and diesel

What's Included:

• 1x Royal Purple HPS 20W-50 Synthetic Motor Oil — 1 quart (RLP36250)

Usage Notes:

• Verify your specific engine manufacturer's oil viscosity specification before use — 20W-50 is not correct for all engines — use only the viscosity grade specified by your engine manufacturer
• Verify compatibility with your engine's seals and gaskets before use — consult Royal Purple's product documentation for compatibility information
• Change oil and filter at the manufacturer's recommended interval — do not extend oil change intervals beyond the manufacturer's specification
• Dispose of used motor oil responsibly — take used oil to a certified used oil collection facility

Why Royal Purple?

Royal Purple is one of the most respected performance lubricant brands in North America — a brand trusted by professional racers, engine builders, and performance enthusiasts for superior lubrication protection in demanding applications. Royal Purple's HPS motor oil lineup is engineered specifically for high-performance street use — elevated ZDDP anti-wear protection, proprietary Synerlec additive technology, and a full-synthetic formulation that outperforms leading synthetic and conventional lubricants. For performance engine owners who want a premium full-synthetic motor oil with elevated anti-wear protection and Royal Purple's proven Synerlec technology in a 20W-50 viscosity grade, RLP36250 is the correct choice.

Perfect For:

• High-performance gasoline and diesel engine owners who want Royal Purple HPS 20W-50's elevated zinc/phosphorus anti-wear protection and Synerlec additive technology for superior engine protection in high-temperature, high-load operating conditions
• Classic and vintage engine owners with flat-tappet camshafts who need elevated ZDDP levels for correct cam lobe and lifter protection — Royal Purple HPS's high zinc/phosphorus content is the correct choice for flat-tappet applications
• High-mileage and older engine owners who want the thicker 50-weight film at operating temperature for maintained oil pressure and film thickness at increased bearing clearances

Note: Verify your engine manufacturer's oil viscosity specification before use — 20W-50 is not correct for all engines. Sold as a single 1-quart bottle — case quantity is 6 quarts. Dispose of used oil responsibly.