Mileage Plus Lubricants when used in engines compliant with BS IV or EURO 4 standards lowers fuel consumption by 3% to 4 %. 5% in the case of engines compliant with the Euro 5 or BS V. This reagent is used with the Selective Catalytic Reduction (SCR) system to reduce emissions of Nitrous oxide from the exhaust of diesel vehicles. It is a 32.5% solution of high-purity urea in ultra pure water that is clear, non-toxic and safe to handle.