Nobody offers a more comprehensive line of motorcycle-specific oils and chemicals than Pro Honda. Developed through the performance and durability testing of professional racing, these Honda motorcycle oil and service products are crafted to the same high exacting standards as your Honda. With years of testing and development behind it, Pro Honda HP4 stands as the definition of excellence for 4-stroke motorcycle oils. It offers increased anti-foaming qualities, higher viscosity index for stability over a broader range of temperatures, and even greater shear stability than most other oils. Naturally, HP4 blends the heat stability and shear resistance of synthetic oil with mineral oil's natural lubricity yielding premium quality four-stroke engine oil. Best of all, HP4 is approved for use in all Honda Powersports products. Pro Honda P/N: 08C35-A14W0M.