The High Frequency Reciprocating Rig (HFRR-4.2) is a state of the art fuel lubricity tester that is designed for full compliance with global test standards. Its compact and easy to use design makes tests simple to set up and the high precision automated humidity control system eliminates manual activities by the operator. The HFRR 4.2 can be used to test diesel fuel, gasoline and lubricants. It can also be used for fretting wear tests with its low displacement, high frequency reciprocating testing mode.