ULTRA 1PLUS 4T 10W-40 Full Synthetic Motorcycle Oil, 6-Quart Pack — JASO MA2, API SN

ULTRA 1PLUS 4T 10W-40 is a full-synthetic motorcycle oil engineered to protect engines, clutches, and gearboxes while maximizing performance across street and off-road riding.

This six-quart pack of ULTRA 1PLUS 10W-40 delivers a modern synthetic formulation that meets API SN and JASO MA2 specifications. It’s formulated for 4-stroke motorcycles, ATVs, and powersports machines that require a lubricant balancing shear resistance, thermal stability, and smooth wet-clutch operation. The oil targets riders and mechanics who want consistent shifting, reduced wear under high RPM, and cleaner engine internals without sacrificing throttle response.

How does this oil protect engines during high-stress rides?

ULTRA 1PLUS 10W-40 uses anti-wear additives and high-shear stable base stocks to maintain a protective film under heavy load and high temperature. That reduces metal-to-metal contact, helping components last longer during spirited riding or towing.

• High-shear stability preserves viscosity under stress for consistent lubrication.
• Anti-wear agents limit scoring and surface fatigue in pistons and bearings.
• Resists sludge and varnish to keep oil passages clear and functioning.

Will it keep wet clutches and gearboxes working smoothly?

Yes — the oil is JASO MA2 certified, which means it’s formulated to protect wet-clutch performance and ensure progressive, slip-free engagement. Gear shifting remains precise at varied RPM ranges, making it suitable for modern multi-gear motorcycles and race-tuned setups.

• JASO MA2 rating prevents clutch slippage in wet-clutch systems.
• Controlled friction characteristics for predictable engagement and braking feel.
• Gearbox protection reduces wear on dog teeth and synchromesh components.

How does this oil perform across temperatures and riding conditions?

The 10W-40 viscosity offers a versatile balance: easier cold starts than thicker oils and strong film strength when hot. The synthetic formulation resists oxidation and viscosity breakdown, making it reliable for daily street use, track days, or off-road sorties.

• 10W cold-start rating improves pumpability in moderate climates.
• 40 grade at operating temperature maintains protective film under heat.
• Oxidation inhibitors reduce thickening and extend service intervals.

Is this oil compatible with modern emission systems and different bike types?

ULTRA 1PLUS 4T 10W-40 is suitable for motorcycles with or without catalytic converters and works with a broad range of four-stroke engines. It meets API SN so it aligns with current engine maintenance expectations while supporting both performance and commuter bikes.

• Safe for use in bikes equipped with catalytic converters.
• Recommended for street bikes, sportbikes, cruisers, and ATVs.
• Formulated for both high-performance and everyday riding needs.

Who is this for? Riders, fleet technicians, and weekend track enthusiasts who demand a robust, full-synthetic 10W-40 that balances clutch feel, gearbox protection, and engine durability will benefit most from ULTRA 1PLUS 4T oil. Choose this six-quart pack if you perform regular maintenance on multiple machines or prefer having enough oil for two to three changes on many mid-displacement motorcycles. It’s a practical option for anyone looking to maintain peak performance without frequently switching formulations.