CIMAC issues its fuel quality recommendations

CIMAC, the international organisation founded to promote technical and scientific knowledge in the field of internal combustion engines, last year issued the fourth edition of its recommendations regarding fuel quality for diesel engines. This replaces the previous edition dated 1990 which has been technically revised.

The latest edition introduces several important changes including the reduction of the number of residual fuel grades from 13 to 10, change of temperature for viscosity measurement from 100 C to 50 C and incorporation of the future lower global limits for sulphur and sulphur controlled grades for SOx emission control areas. Other changes involve a reduction of maximum water content to 0.5% V/V, revision of maximum viscosity limit for A 30 fuel grade, a prohibition on the inclusion of used lubricating oil in marine fuel controlled by means of inclusion of the limits for elements fingerprinting the presence of used lubricating oil.