Maxima's Racing Shock Fluid is a blend of the finest petroleum base stocks available. With extremely high viscosity indexes over 350+, low pour points and reduced friction capability, these high performance fluids show a considerably reduced rate of viscosity change when subjected to elevated temperatures. Racing Shock Fluid will work equally well in either steel or aluminum bodied suspension components. Racing Shock Fluid "Light - 3WT" can be used in all late model MX motorcycle shocks. Racing Shock Fluid "Medium" can be used when more damping is required. Use "Heavy" for Ohlins® and FOX® shocks.