Star auto cool is recommended for use as anti-freeze radiator coolant in all automotive radiator coolant applications including trucks, jeeps, 3 wheelers, cars, etc. For severe duty applications full the radiator with 1:3 ratio of star auto cool and clean water respectively. For normal duty application fill the radiator with 1:7 ratio of star auto cool and clean water respectively. In use coolant level should be maintained properly and topped up with Auto cool where ever the level is insufficient. For best performance change Auto cool very 20000 km or 6 months whichever is earlier.