Based on proven Shell Rotella ELC OAT technology, Shell Rotella ELC Nitrite Free (NF) Pre-Diluted 50/50 Antifreeze/Coolant provides extended life operation up to 1,200,000 miles in Class 8 over-the-road operation. It is recommended for use in diesel, gasoline, and natural gas engine-powered vehicles along with light-duty passenger cars and pick-up trucks with proper maintenance. The OAT technology also promotes excellent heat transfer to help keep heavily used engines cool during the summer. Shell Rotella ELC NF is formulated to provide protection against freezing at low temperatures and boil-over at high temperatures and/or severe operating conditions at proper dilutions. This nitrite-free formulation provides improved protection of aluminum components in modern engines (including brazed aluminum heat exchangers), and it meets many of the newest OEM specifications. Pre-diluted version requires no further dilution.