CONCENTRATED ANTIFREEZE AND COOLANT: Extended Life coolant for ALL heavy-duty diesel, gasoline, and natural gas engine cooling systems HEAT TRANSFER: Excellent heat transfer for high-temperature applications such as engines with EGR and SCR systems ADDED VERSATILITY: Can be mixed with other coolants (to maintain corrosion protection, contamination levels should be kept below 25%) LONG-LASTING: Antifreeze coolant mixture can protect for one million miles of on-road use with proper maintenance GENTLE FORMULA: Non-abrasive formula can improve water pump seal life; this item contains a bittering agent called Denatonium Benzoate