2005 HONDA GL1800/A GOLD WING GALLON OIL CHANGE KIT 1 Gallon of Honda GN4 10W-40 4-Stroke Motorcylce Oil. Honda set the standard for motorcycle oil when it introduced GN4 in 1975. They selected the highest-quality base stocks, and created an additive package specifically designed for the unique requirements of motorcycle engines. Constant testing and development has given today's GN4 even better shear resistance, viscosity stability and cleanliness to meet the requirements and stresses of a new era of engine technology. **Kit includes One Genuine Honda OEM Oil Filter and One Crush Washer