Fuel lubricity

Examines the issues surrounding fuel lubricity by explaining the background to the problems surrounding lubricity in diesel engines. As the need for low sulphur diesels arose it became clear that a universally accepted bench test was required and ISO working group SC7/WG6 was set up in 1992 to decide on a standard test. The group recommended that an HFRR (high frequency reciprocating rig) ball‐on‐flat test should be adopted. Describes the test methodology.