4into1 Honda GN4 10W-40 Motorcycle Oil 1 qt - 4-Stroke OEM Formula, Wet-Clutch Safe

Genuine Honda GN4 10W-40 SJ is a factory-formulated 4-stroke motorcycle oil designed for Hondas, including vintage bikes with wet clutches.

This oil is the genuine Pro Honda GN4 formula first developed to meet motorcycles' unique lubrication needs. Packaged in a 32 fl. oz. (1 quart / 946 ml) container and sold under Honda OEM part number 08C35-A141M01, this 10W-40 SJ grade combines high-quality base stocks with an additive package tailored for motorcycle and ATV engines. GN4 has been refined through ongoing testing to improve shear resistance, viscosity stability and engine cleanliness for a wide range of street and light-touring machines.

What makes GN4 10W-40 different from regular engine oils?

GN4 is formulated specifically for motorcycles, which often share oil between the engine and the transmission or have wet-clutch systems. Its additive balance preserves clutch grip while protecting gears and bearings under motorcycle-specific loads and RPM ranges.

• Motorcycle-focused additive package for wet-clutch compatibility.
• Viscosity rated 10W-40 to perform across a broad temperature range.
• Manufactured to Honda factory specifications for OEM-fit performance.

How does this oil support older Honda and vintage bikes?

GN4's formula was developed with long-term durability in mind, making it suitable for vintage Hondas that rely on traditional wet-clutch and gearbox designs. The oil's shear resistance and stability help preserve clearances and maintain consistent protection even in older engines.

• Proven compatibility with classic Honda wet-clutch setups.
• Improved viscosity stability helps reduce thinning under high stress.
• Helps limit deposits and maintain cleanliness in older engine internals.

When should I use 10W-40 GN4 in my motorcycle?

Choose 10W-40 GN4 when your owner's manual lists 10W-40 or a similar viscosity for your riding conditions, or when you want a versatile oil that handles temperate climates and moderate engine loads. It is a practical choice for everyday street riding, light touring, and classic Honda models.

• Ideal for temperate climates and mixed city/highway use.
• Recommended for bikes specifying 10W-40 or GN4-compatible oils.
• Good for routine oil changes and seasonal maintenance on Hondas.

How do I verify this is the correct OEM oil for my Honda?

Confirm compatibility by checking your motorcycle's owner's manual or the parts listing for the OEM part number. This bottle carries Honda part number 08C35-A141M01 and is the factory GN4 10W-40 SJ formulation intended for use where Honda specifies GN4 or equivalent.

• Look for Honda OEM part number 08C35-A141M01 on the label.
• Cross-check your owner's manual viscosity and API SJ recommendations.
• When in doubt, consult a Honda dealer or qualified mechanic.

Who is this for? Riders who own Hondas or compatible motorcycles—especially those with wet-clutch gearboxes or vintage machines—will benefit from this genuine factory oil. Mechanics, restorers, and owners seeking an OEM-approved 1-quart supply for regular servicing will appreciate GN4's heritage, clutch compatibility, and balanced protection across engine and transmission components.