Non-Detergent Lubricating Oil, 1 quart. 100-200 SSU @ 100°F (Light SAE 10). Minimum aniline point of 200°F.

For ARO FRL systems, this is exactly what's called for. It's a non-detergent, light-bodied oil with a viscosity in the 100-200 SSU range at 100 degrees F, which puts it squarely in the SAE 10 class. That weight is standard for airline lubricators and pneumatic control systems. The non-detergent formula matters here too since detergent oils can cause problems with seals and internal components in pneumatic equipment.

For an airline FRL lubricator setup, non-detergent lubricating oil is the intended type, and this one is specifically called out for professional use in airline FRL systems in a 1 quart bottle.