HFRR HFRR: High Frequency Reciprocating test rig as per ASTM D6079 for fuel lubricity testing. http://www.fuellubricity.com/
HFRR Tribotech.net: ASTM D 6079 is the standardized procedure for evaluating the lubricity of a diesel fuel using a high-frequency reciprocating rig (HFRR). http://www.tribotech.net/