Review on Bar'S Leaks High Mileage Cooling System Repair, 16.9 Oz by Lloyd Edwards

I added entire bottle like directions said. The next day driving to work I noticed the heat wasn'tgetting very warm, the next day I put a thermometer in the vent and the temp. coming out was only 60degrees. This product clogged the heater core and cost $100 to have it flushed out to where the heateris back to normal. (140 degrees). On the flip side it did stop the small coolant leak coming from the engine.