Yeah mate, Put the heater on and let the car run for 15 min with the idle on about 3000 till it got hot and the thermostat opened and then switched it off and checked the water level again after it cooled down and took about 1.5 litres and then checked it everyday for a few days in the morning to make sure it was full. I know 100% its not water because it backfires on high gear and low revers...