Nobody offers a more comprehensive line of motorcycle specific oils and chemicals than Pro Honda. And nobody else crafts these products to the industrys most demanding standards...Hondas! Pro Honda Oils and Chemicals are developed through the most severe test of performance and durability - professional racing. Honda builds its products to the toughest engineering standards in the world. Pro Honda formulates its oils and chemicals to those same demanding standards to keep your Honda running at its maximum performance. Theyre the very best motorcycle-specific products you can buy. Exclusive formula developed by Honda RD. Specifically designed for use in aluminum engines. Uses high-tech organic corrosion inhibitors instead of more commonly used silicate corrosion inhibitors. Unlike silicates, HP Coolants organic corrosion inhibitors wont gel and cause radiator plugging. They are also more stable for a longer shelf life and dont act as abrasives to mechanical water pump seals which may cause leaks.