From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Advertisement for K.W. Colloidal Motor Graphite, detailing its performance benefits and application.
| Identifier | ExFiles\Box 145\3\ scan0046 | |
| Date | 29th July 1936 guessed | |
| K.W. COLLOIDAL MOTOR GRAPHITE RESISTS HEAT, FIGHTS FRICTION & IMPROVES PERFORMANCE K.W. MOTOR GRAPHITE is a colloidal graphite solution that creates a glass smooth surface on frictional metal parts. It defies heat. It defies the washing effects of petrol. It protects your engine—saves repair bills. It saves oil. It saves petrol. Even in the finest and most expensive engines of to-day there are minute pores and indentations in the metal of frictional parts such as pistons and cylinders. These cause friction, and friction causes heat. Heat is the deadly enemy of every engine! K.W. MOTOR GRAPHITE has a strong affinity for frictional metal—adheres to it and fills up these tiny pores and indentations. Thus a velvety smooth surface is formed—a graphoid surface is created, and friction, with its resultant dangers, is reduced to a minimum. Most lubricating engineers will tell you that graphite is the finest lubricant known. Oils spread more readily and adhere more efficiently on this graphoid surface than on bare metal, hence lasts longer and gives better lubricating value. K.W. MOTOR GRAPHITE assures a sweet running engine by reducing friction to the very minimum. It saves oil—3,000 miles without a change of oil being necessary. It saves petrol. and it saves the cost of numerous repairs. GRAPH DATA: The graph shows miles achieved versus gallons of petrol used. - Line 1 (Black): PETROL + K.W. GRAPHITE, ends at 2031 MILES for 100 gallons. - Line 2 (Orange): PETROL, ends at 1800 MILES for 100 gallons. - Y-Axis: Miles (0 to 2030) - X-Axis: GALLONS PETROL USED (0 to 100) AN ACTUAL CASE Amongst many hundreds of testimonials received the following from Mr. H.{Arthur M. Hanbury - Head Complaints} F.{Mr Friese} Monday, Salesman, of Bristol, affords striking evidence of the mileage increase that invariably follows the use of K.W. Motor Graphite:— “I have tried out K.W. Graphite on my V.8 Ford and can give you definite figures as under : On 50 gallons of petrol without K.W. - 900 miles On first 50 gallons of petrol and K.W. - 1,000 ” On second ” ” ” ” ” ” - 1,031 ” On third ” ” ” ” ” ” - 925 ” This shows on the first 100 gallons, after the introduction of K.W., about 11 per cent. increase on mileage. (From the above figures it is clear that 1 tin of K.W. Graphite A is roughly sufficient for 100 gallons of petrol.) [Image Caption Left] A greatly magnified view of a cylinder wall showing the indentations or pores in the metal before application of K.W. Motor Graphite. This uneven surface causes friction. [Image Caption Right] Same view of cylinder wall showing (in colour) how these indentations are filled with K.W. Motor Graphite, making a glassy smooth surface which greatly reduces friction. K.W. COLLOIDAL MOTOR GRAPHITE For further particulars write to— E.{Mr Elliott - Chief Engineer} P. BARRUS LTD. 35-37, Upper Thames Street, London, E.C.4 | ||