What Happens If There Is Too Much Engine Oil?

1 Answers
LeLane
07/30/25 6:44am
Excessive engine oil can lead to the following serious consequences: 1. Too much oil reduces engine power output: When the engine is running, the crankshaft and connecting rod big end move rapidly. If there is too much oil, the crankshaft and connecting rod will churn the oil violently. This churning consumes energy, which inadvertently reduces the engine's power output and increases fuel consumption. With today's high fuel prices, this is quite uneconomical. Additionally, reduced power output due to excessive oil can cause the car to feel sluggish, produce a dull sound, and increase noise levels. 2. Too much oil can cause blue smoke from the exhaust pipe: Excessive oil leads to vigorous splashing by the crankshaft and connecting rod big end, forcing large amounts of oil into the combustion chamber, where it burns. This results in blue smoke from the exhaust pipe, a phenomenon known as 'oil burning,' which is also an indicator of excessive fuel consumption. 3. Too much oil can cause piston ring seizure and fuel injector clogging: Large amounts of oil forced into the combustion chamber can burn and form carbon deposits on the piston rings, piston top valve seats, and fuel injectors. This can lead to piston ring seizure, fuel injector clogging, and increased wear between the piston and cylinder. Excessive carbon buildup can also cause engine knocking.
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