A REVIEW OF The B.S.I. DRAFT SPECIFICATION FOR ENGINE LUBRICATING OILS (H.D. TYPE) Available to Purchase

In the January issue of Scientific Lubrication details were provided of the new Ministry of Defence Specification DEF/2101, which covers three grades of Heavy Duty crankcase oils designed for use in the compression and spark ignition engines of ground equipment operated by the three Services. This specification means the virtual adoption of the U.S. Army Ordnance MIL‐O‐2104 specification, the DEF/2101 specification differing from MIL‐O‐2104 specification only in so far as the viscosity limits of the three grades are concerned.