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← TechnologyWhich outcome occurs when a GDI engine experiences fuel dilution?
A)Increased engine oil viscosity
B)Reduced octane rating of fuel
C)Hydrocarbon emissions increase steadily✓
D)Improved fuel combustion efficiency
💡 Explanation
Increased hydrocarbons occur because fuel dilution interferes with combustion via decreased fuel viscosity. This reduces complete combustion; thus, the unburned fuel exits via exhaust, rather than achieving perfect oxidation, which products would include water and carbon dioxide instead.
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