Posts Tagged: fuel dilution in engine oil

Motor Oil Contamination — How Motor Oil Degrades

What Causes Motor Oil Contamination? Quick Summary Motor oil contamination is a process. Heat, oxygen, combustion by-products, blow-by, fuel dilution, moisture, soot, acids, and additive depletion all work against the lubricant over time. • Motor oil contamination begins as soon as the engine operates. Combustion gases, microscopic particles, fuel, and moisture can all find their way into the crankcase. • Heat and oxygen chemically attack the lubricant, causing oxidation and eventually producing acids, deposits, and viscosity changes. • Fuel dilution can reduce oil viscosity and film strength, particularly during repeated … Read More