Technical Paper
EFFECT OF ADDITION AGENTS IN LUBRICATING OIL ON PISTON AND RING PERFORMANCE IN GASOLINE AND DIESEL ENGINES
1937-01-01
370095
With the increase in horsepower output per cubic inch displacement, gasoline and Diesel engines are more susceptible to ring sticking and piston ring or cylinder liner wear. Formerly crank case oil stability (how the used oil looked when drained after 50 hours or more operation in an engine) was considered of prime importance. It was thought that the tendency of mineral oils to cause ring sticking depended largely on the degree of refinement of the lubricating oil, but this has not proven to be the case with Diesel engines or with high output gasoline engines. Highly solvent treated oils have been shown to be deficient in lubricating value and ring sticking caused by excessive blowby has resulted. Such high output gasoline and Diesel engines will operate on straight mineral oils at reduced loads; but reduced cylinder wear, freedom from ring sticking and sludge reduction can be had only with proven addition agents.