Pro Honda GN4 All Purpose Engine Oil Honda set the bar high back in 1975 with their GN4 All Purpose Engine Oil, and to this day that bar is still set to the same standards. No more need in researching all the nitpicky little differences when deciding which oil to choose, as no one knows your machine quite like the Big Red themselves. Features: Created with the highest quality base stocks and additives in mind specifically for your ride Continuous testing and development resulting in a lubricant with better shear resistance and viscosity stability Designed to meet the requirements of stresses in the new era of engine technology