Which outcome results when lubricating oil viscosity decreases in an idling engine?

💡 Explanation

Decreased viscosity allows thinner oil film, increasing contact stress and accelerated wear via adhesive wear mechanism. Therefore, engine component wear rate increases, rather than enhanced fuel combustion or stable oil bearings, because the hydrodynamic lubrication regime degrades.

• Which phenomenon causes increased gamma ray frequency at Earth's surface?
• Which outcome occurs when an ammonia absorption refrigerator freezes?
• Which risk increases when exceeding turbine design limits in a power plant's Rankine cycle?
• On a Carnot heat engine utilizing a non-ideal gas, deviations from expected work output arise because of which energy exchange mechanism?
• Which mechanism limits complete conversion in reversible esterification reactions reaching equilibrium?
• Which risk increases because of unavoidable limitations in a Carnot engine?