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 COLGRA, a super-lubricant oil additive.
| Identifier | ExFiles\Box 146\2\ scan0221 | |
| Date | 10th January 1936 guessed | |
| COLGRA-The Super-Lubricant Plus! Present day motors demand more than ordinary oil for proper lubrication. High speeds and heavy loads wipe moving surfaces dry. Many of the newer cars run over 3500 R.{Sir Henry Royce} P. M.{Mr Moon / Mr Moore} as compared with 2200 R.{Sir Henry Royce} P. M.{Mr Moon / Mr Moore} average on old cars. Higher temperatures bring decomposition of ordinary lubricants, resulting in metal-to-metal contact of moving parts, causing friction and wear. That's why COLGRA is so important, for it accomplishes what oil alone cannot do. There are elements in COLGRA which increase the film strength of any oil to which it is added so tremendously that the lubricating value is DOUBLED and TREBLED. KEEPS VALVES, SEATS, AND UPPER CYLINDERS CLEAN COLGRA is an enemy of carbon. When used in the motor fuel or top oiler, it seeks metal and burrows through carbon. It penetrates, softens and loosens hard carbon deposits, which in turn are blown out with the exhaust. Valve stems, guides and seats as well as the upper cylinders are thoroughly lubricated. Valves are kept clean and close-seated for more power and lower mileage cost. Cylinders are more tightly sealed and compression is increased, for COLGRA quickly attaches itself to the pistons, rings and cylinder walls, forming a perfect plated lubrication surface. COLGRA is remarkably economical to use—only 2 ounces per quart of oil, 2 ounces to every 10 gallons of gasoline and 2 ounces per pound of grease are required. The increased compression—smoother and more powerful motor performance—saving of motor repairs, etc., that COLGRA users enjoy is worth many times its cost. Shown above are a COLGRA treated valve and an untreated valve. Note the difference. The COLGRA treated valve is clean and its seat perfect. The untreated valve is badly carboned and burned. FULLY GUARANTEED! COLGRA is unreservedly guaranteed, when directions are followed, to form a “plated lubrication” surface on all metal-to-metal moving parts, reducing friction, heat and wear. It is also guaranteed to preserve the oil body longer, establish a more perfect seal between pistons, rings and cylinders for better compression and more power; penetrate, soften and loosen carbon; smoothen and quiet motor performance, and save fuel and oil. COLGRA passes freely through filters, oil lines, jets or wicks. It contains no chemicals, acids, graphite or harmful elements. COLGRA will not injure alloy bearings, plated pistons or delicate mechanisms. PROOF! THAT COLGRA PROVIDES PLATED LUBRICATION Above is shown the moving parts of a motor that are so vitally affected by the kind of lubrication used. Subjected to extreme heat, the average oil naturally thins out. Then too, there is always some dilution which reduces the film content of ordinary oil. No wonder then that vital parts become worn and noisy—compression is reduced and power lost. Just how valuable the additional film strength protection of COLGRA is to any oil, is proven by tests made with genuine Timken bearings. These tests, carefully conducted show that a bearing when lubricated with even the best grade of motor oil, burns out at around 2,000 to 3,000 pounds of pressure. An addition of only 6% of COLGRA to the same oil, will enable a bearing to withstand pressures of from 12,000 to 15,000 pounds and even more. Additional proof of the value of COLGRA is the fact that the burned out bearing can be run in oil treated with COLGRA and will perform smoothly without a single sign of “knock or ping” up to 8,000 pounds pressure. Think then of the protection COLGRA super-film offers to circle bearings, cams, gears, valves and guides and all contacting surfaces—thus lengthening the life of motors and keeping them smoother and more quiet! See Sworn Statement on Back Page! | ||