Lucas Oil Synthetic Motorcycle Fork Oil is manufactured using the highest quality synthetic base oils and a unique additive package to extend the life of your motorcycle fork's internal components and improve performance. This high performance synthetic fork oil provides better wear protection and reduces thermal expansion. The additive package prevents oxidation, oil thickening, seal hardening, foaming and static friction. Lucas Oil Synthetic Motorcycle Fork Oil is designed for use in all fork systems including damping rod, cartridge, bladder, inverted and conventional.