What is the difference between NNL 690, NNL 690G, and Hydra Maxx?
NNL 690, originally recommended as a universal oil additive, was formulated for gasoline and diesel internal combustion engines. It contains anti-wear and boundary lubricating additives, acid neutralizers, corrosion inhibitors, metal deactivators, detergents, dispersants and anti-oxidants to provide improved, complete and balanced protection to typical engine oils. NNL 690G was developed to be compatible with the chemistry of extreme pressure gear lubricants. As the use of NNL 690 became more prevalent in extreme pressure lubricants it became evident that some components in NNL 690 that are important in engines are not required in gearbox applications. NNL 690G was formulated to better suit the conditions within gearboxes. The unique formulation of NNL 690G also makes it suitable for use in engines requiring low-ash or ashless oils. Hydra Maxx is a hydraulic and compressor oil additive that has been formulated to provide the same lubricating and extreme pressure benefits as NNL 690 and
