ULTRA 1PLUS 4T 10W-40 Full Synthetic Motorcycle Oil - Durable

Our review of the ULTRA 1PLUS U1P 10W-40 full synthetic motorcycle oil finds it best for riders who demand dependable protection for 4-stroke engines and wet clutch systems. The bottom line: this oil delivers stable performance under high heat and high RPM, with certified JASO MA2 clutch compatibility that makes shifting and clutch feel particularly smooth. For motorcyclists, ATVs and powersports users who prioritize engine longevity and consistent shiftability, this formula is a no-nonsense, value-oriented choice.

Key Features

• API SN protection: Provides modern engine safeguards against wear and deposits to keep pistons and rings cleaner during extended use.
• JASO MA2 certified: Ensures reliable wet clutch engagement and precise shifting for high-performance motorcycles and standard street bikes.
• Full synthetic 10W-40: Offers high-shear stability so viscosity holds under stress, preserving oil film at high RPM and during hard riding.
• Thermal and oxidation stability: Resists sludge and varnish buildup even in hot-running engines, helping maintain throttle response and fuel efficiency.
• Gearbox and clutch protection: Formulated with anti-wear agents to extend life of transmission components under combined engine and gearbox load.
• Versatile compatibility: Suitable for 4-stroke motorcycles and ATVs, including those with catalytic converters, across street and off-road conditions.

Who It's For

This oil is aimed at everyday riders and performance-minded bikers who run wet clutch systems and need a single oil that covers engine, gearbox and clutch requirements without constant top-ups. It suits owners of sport, naked and touring bikes as well as ATVs that see a mix of street and spirited off-road use.

Riders who want fully synthetic protection without paying a premium for niche race blends will find good value here. Those who need an ultra-specialized racing lubricant or a manufacturer-specific blend for vintage or exotic engines should check their owner manual for any unique requirements before switching.

Pros & Cons

Pros

• Strong engine protection with API SN level performance for modern engines.
• Notable clutch smoothness and shiftability thanks to JASO MA2 certification.
• Good thermal stability and resistance to sludge, helping maintain performance over time.
• Cost-effective full synthetic option in a 6-quart package for multiple changes.

Cons

• Not targeted at ultra-specialized racing teams that require bespoke competition fluids.
• Labeling does not list every additive detail, so riders relying on proprietary additive specs may prefer OEM-recommended fluids.

Specifications

Brand	ULTRA 1PLUS
Product	U1P 10W-40 Full Synthetic Motorcycle Oil
Viscosity	10W-40
API Rating	API SN
JASO Rating	JASO MA2
Quantity	6 QTS
Application	4-stroke motorcycles, ATVs, powersports engines

Our Verdict

The ULTRA 1PLUS U1P 10W-40 is a practical, full synthetic motorcycle oil that balances performance and value; it is especially worth buying for riders who need a reliable, JASO MA2-certified lubricant that protects engine, clutch and gearbox under a variety of riding conditions while delivering smooth shiftability.

Frequently Asked Questions

Is this oil suitable for wet clutch systems?
Yes, it is JASO MA2 certified specifically to ensure proper clutch engagement and smooth shifting in wet clutch motorcycles.

Can it be used in ATVs and powersports engines?
Yes, the formulation is designed for 4-stroke motorcycles, ATVs and other powersports engines, including models with catalytic converters.

How does it perform at high temperatures?
The full synthetic base and additives provide advanced thermal and oxidation stability to resist sludge and maintain protection under high engine heat.