Study of the Influence of the Type of Fuel used in Internal Combustion Engines over the Rheological Propertiesof Lubricants

Abstract

This research intends to determine the rheological models suitable for Castrol 10W40 oil and to study the relationship between viscosity and temperature at different shear rates. Three different states of the lubricant have been investigated: fresh lubricant, lubricant degradation in a gasoline internal combustion engine, and lubricant degradation in an LPG internal combustion engine. The main conclusion of the study is that, from a rheological point of view, the level of degradation of the lubricant from an LPG internal combustion engine is very reduced by comparison with the same lubricant from a gasoline internal combustion engine.