When you’re pushing your machine to the absolute limit, compromise isn't an option.
 
Penrite MC-4ST 10W-40 is a premium, 100% PAO & Ester full synthetic engine oil engineered for riders who demand ultimate performance and bulletproof protection. Infused with Penrite's legendary FULL ZINC + anti-wear additive pack, this oil delivers an aggressive shield for your engine, gearbox, and clutch under the most brutal operating conditions.
 
Tested and trusted by Factory Racing teams, the MC-4ST line is built to survive high RPMs, extreme heat, and heavy loads without breaking a sweat.
 
The Formula: Pure Synthetic Dominance
100% PAO & Ester Base: The gold standard of synthetic technology. Provides unmatched oil film strength, incredible heat resistance, and maximum shear protection.
Shear-Free Formulation: Eliminates viscosity breakdown. Your oil stays exactly at its engineered weight, maintaining rock-solid oil pressure even when the engine is screaming at the redline.
FULL ZINC + (1800+ ppm): Extreme zinc levels deliver industry-leading protection against wear, cylinder scuffing, and metal-on-metal friction.
Total Engine Hygiene: Actively fights off oil oxidation, piston deposits, sludge, and corrosion, keeping your internals factory-clean.
 
Application & Compatibility
MC-4ST 10W-40 is the ultimate multi-tasker for high-performance four-stroke machinery. It is highly optimised for wet-clutch systems, offering precise slip prevention and smooth power transfer that fully complies with JASO MA2 standards.
 
Where to Use It:
Bikes & ATVs: Modern road & sports bikes, dirt bikes, enduro machines, ATVs/Quad bikes, and high-output 4-stroke scooters.
Transmissions: Perfect for combined engine/gearbox setups requiring wet-clutch compatibility.
Broad Compatibility: Directly replaces semi-synthetic or conventional oils where SAE 10W-30 or SAE 10W-40 grades are recommended.
Major Manufacturers: Suitable for use in Aprilia, BMW, Cagiva, Can-Am, Ducati, Hyosung, Kawasaki, Suzuki, Triumph, Yamaha, and more.
Alternative Uses: Stationary engines, generators, and equipment requiring this viscosity and spec. Safe for use with petrol, racing fuels, and vehicles equipped with catalytic converters or secondary air injection.
 
Specifications
Base Oil: 100% PAO & Ester Full Synthetic
Viscosity: 100% Shear-Free 10W-40
Zinc Levels: 1800+ ppm (Full Zinc +)
API Standards: SP / CF
JASO Standards: MA2 (Backward compatible with JASO MA and JASO MA1)
 
Factory Racing Approved
Penrite products are forged in the fires of competitive motorsport. Used daily by Factory Race Teams, this is the exact same technology protecting championship-winning engines on the track.