EXTENSIVE FIELD TESTS ON POPULAR CARS: SHOW VALUE OF SUPPLEMENT I OILS WHEN RUNNING UNDER SLUDGE FORMING CONDITIONS Available to Purchase

NOT many people are aware of the amount of testing work that is carried out by the additive manufacturer to ensure that his products meet the requirements of the modern engine when running under a wide range of operating conditions. The layman motorist has perhaps some knowledge of the work done by the lubricating oil companies and the extensive programme of field testing, as well as engine testing, of their products and interested technical engineers are probably even more conversant with details of this work, but very few people outside the lubricating oil industry even know the names of our principle additive manufacturers and still less do they realise the extensive programmes undertaken by their research and development departments. The large scale programme of road testing motor oils undertaken by Lubrizol International Laboratories at “The Knowle”, Hazelwood, Derby, the research and development department of Lubrizol Great Britain Limited (formerly Anglamol Ltd.,) serves as a typical example of the work done to ensure correlation between results obtained in laboratory test engines and the actual motor car. The results of this work have recently been shown to many people from the motor industry, the oil companies and allied concerns. They show the improvement in engine efficiency that can be expected by the addition of suitable additives to straight motor oils in popular motor cars (and therefore, we suggest in most motor cars). They also indicate the fallacy of expecting very good results from multi‐graded oils unless these are correctly treated with additives.