Race Gas Diesel Performance Plus is the only fuel additive on the market designed specifically for diesel and bio-diesel performance. This concentrate raises the Centane level by full 14 numbers, increases throttle response, improves oxygen content for a more efficient burn, and lubricates fuel system components and cylinder walls. Race Gas also adds a detergent package that keeps injectors and valves clean. Scent:Unscented Gallons of Fuel Treated:32 Oxygen Sensor Safe:Yes Volume:32 oz. Quantity:Sold individually.