Polaris PS-4 Full Synthetic 5W-50 Powersports Engine Oil — All-Season protection, anti-wear formulation

Polaris PS-4 Full Synthetic 5W-50 is a powersports-grade, all-season engine oil engineered to protect and optimize 4-stroke Polaris engines across extreme temperatures.

Designed and tested by Polaris engineers, PS-4 5W-50 uses a full synthetic base and a Polaris-custom additive package to reduce deposits, guard moving parts from wear, and control oxidation and moisture. Its broad viscosity range delivers reliable lubrication from very cold starts to high-heat operation, making it suitable for the varied demands of off-road riding, trail work, and recreational use.

How does PS-4 5W-50 protect my Polaris engine during cold starts?

PS-4’s 5W cold-flow rating means the oil remains fluid at low temperatures, improving pumpability and reducing start-up wear. The formula reaches critical engine components faster during cold cranking, lowering friction until operating temperature is achieved.

• Full synthetic base for faster oil flow on startup
• Low-temperature viscosity control to minimize wear
• Additives that prevent deposits during brief warm-up periods

What prevents engine wear and corrosion in demanding conditions?

The Polaris custom additive system is tuned to form protective films on gears and bearings while controlling moisture and corrosive by-products. This lowers component abrasion, reduces oxidation at high temperatures, and helps keep internal parts clean over time.

• Wear-reducing additives for critical engine parts
• Oxidation inhibitors that extend oil life at high heat
• Anti-corrosion agents that manage moisture inside the engine

Can one oil really handle both high-heat and subzero environments?

Yes—PS-4’s wide 5W-50 viscosity spread is tailored for ambient ranges from -40°F to 100°F, providing stable lubrication whether you’re riding in frigid winters or hot summer terrain. That broad range reduces the need to switch grades between seasons for many riders.

• 5W rating ensures cold-weather pumpability to -40°F
• 50 high-end viscosity retains film strength under heat and load
• Engineered for consistent performance across ambient extremes

Is PS-4 the recommended oil for Polaris off-road machines?

Polaris developed and validated PS-4 specifically for its off-road 4-stroke engines, so it meets the company’s engineering criteria for durability and performance. Using the factory-tested lubricant supports engine longevity and helps maintain peak power delivery.

• Polaris-tested and engineering-approved for all Polaris 4-stroke off-road engines
• Formulated to meet high-performance and heavy-duty use cases
• Supports engine performance under race, trail, and utility workloads

Who is this for? Riders, racers, and utility users of Polaris off-road 4-stroke machines who need a single, dependable oil across seasons will benefit most from PS-4 5W-50. It’s ideal for owners who want a Polaris-engineered lubricant that reduces wear, fights corrosion, and maintains lubrication under wide temperature swings without frequent grade changes.