The Bridgeport times and evening farmer., 1920-03-30
MULTIPLICATION WORKED OUT
 BY REFINING. GO.

A saving of millions of dollars in automobile ''upkeep'' is expected to result from a. new Flaw of lubrica- >*ion" being promulgated by the Sin clair Refining Company. This law is based on the simple fact that the condition of the motor is the only true guide in the selection of the proper lubricant, founded on the re- suit of elaborate experiments, the technical details of which were pre- scented recently before the American Society of Mechanical Engineers.
 Power reduction and an increase in the consumption of oil usually result from the misapp1ication of lubricat- ing oil When a car comes from the factory it requires a special grade oi oil. After this car has been run five thousand miles or more the same grade of oil will no longer lubricate the motor properly because the motor has undergone changes that make it advisable to use heavier oil.
 In explaining the practical advan- tages of the new Jaw of fabrication the technical department of the Sim clair Refining Company says:
 Drain your crank case after a trip and you will notice the oil is thinner than the new oil you put into your car This proves that the oil has been diluted during use. Pour some of this drained oil into the palm of your hand-rub it with your fingers and you will notice a sediment of grit and dirt. It is this same sediment, aided by the diluted oil, which causes wear in the motor of a car that has been run for several thousand miles. A worn motor requires a. heavier oil fn cla-q1 orf hot hoe been worn.
 '"The Sinclair Refining Company, has, for the convenience and protec- ton of the motorist, scientifically worked out a chart recommending the correct grade of oil for every well known make of car, and in making recommendations has care fully taken into consideration the various stages of wear as determined by thorough block and road tests.
 This is the first known attempt
 to recommend motor oil by chart upon the basis of wear or condition of the motor.
 ''DiIution of motor oil occurs when
 unburned gasoline escapes past the piston rings into the crank case. This dilution, or thinning out, of the oil may be influenced by the following mechanical or operating conditions: CD Piston clearance.
 CD Richness of mixture. (3) Improper ignition
 (4) Operating temperature of mo- tor affected by weather.
 (5) Body of lubricant or thickness of film on walls of cylinders. (6) Condition of clyinder walls CD Condition of piston rings as af- fecting their all around fit in the grooves and against the clyinder walls. (S) Intermittent operation. (9) Priming and using the choker when engine is cold in starting (10) Choking when overlooking. GID Character of fuel CPD Carburetor out of adjustment (13) Vacuum system out of adjust ment-
 t+Dilution resulting from any or all of these conditions results in loss of fuel, loss of power, wear of motor parts and loss of lubricant. Such losses obviously cannot be eliminated entirely by the mere selec- l tfon of a proper grade of oil, but it is believed that the application of this simple but newly discovered law of fabrication will focus the attention of automobile users upon the import | ance of these various factors and will thereby result in double advantage to all concerned.''