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← ScienceWhich risk dramatically increases when internal combustion engines operate far below their optimal temperature range?
A)Thermal runaway reduces efficiency
B)Oil undergoes rapid thermal cracking
C)Water accumulates in crankcase oil✓
D)Exhaust catalysts become permanently poisoned
💡 Explanation
Crankcase oil becomes diluted when engines operate far below optimal temps causing water accumulation, because incomplete combustion leads to blow-by; the water condenses rather than evaporating. This dramatically increases corrosion risks; therefore answer C, rather than thermal or catalyst issues.
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