LUBRICANT SPECIFICATIONS: PART FOUR CRANKCASE OILS Available to Purchase

IT IS OF INTEREST TO RECALL THAT while B.S. 210, issued in 1924 was the first British Standard covering mineral lubricating oils, this was not the first time that the British Standards Institution had paid attention to the petroleum industry. Earlier, in 1921 and 1923 motor spirit and benzol had been covered by B.S.121 and B.S.135 respectively. Shortly after B.S.210, further attention was paid to this field in general by the issue, in 1927, of B.S.148 and in 1929 of B.S.188. B.148 dealing with insulating oils for electrical purposes, has subsequently been revised but in the main is little changed even today. B.S.188 deals with the determination of viscosity in absolute units, a matter closely related to lubricants and of obvious interest to those engaged in lubricant testing and manufacturing control. It is in the process of revision and enlargement and a draft has just been issued for comment.