Thanks to the establishment of JASO standards, HP4's extraordinary additive package offers increased antifoaming qualities, a 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, yeilding premium-quality four-stroke engine oil. Best of all, HP4 is approved for use in all Honda Powersports products.