Q:

What causes a gas odor in engine oil?

A:

Quick Answer

A gas odor in engine oil is caused by contamination of the engine oil by gas, usually due to a leaking fuel line or malfunctioning fuel injectors. However, it is normal for a small amount of gas to get into the engine oil during normal engine operation.

Continue Reading
What causes a gas odor in engine oil?
Credit: Getty Images North America Getty Images Sport Getty Images

Full Answer

Gas in engine oil becomes a cause for concern when the volume of gas exceeds 2.5 percent. This results in a significant reduction in the oil’s viscosity, which affects engine lubrication and causes scoring of the cylinder walls. Getting the car to a mechanic as soon as possible can prevent excessive engine wear. The mechanic drains and changes the oil and finds and fixes the fuel line leak or injector malfunction.

Learn more about Engine Oil

Related Questions

Explore