gas and oil in my air filter. whats causing this?

Asked by Dec 23, 2013 at 12:10 AM about the 2000 Ford Focus SE

Question type: Maintenance & Repair

changing my air filter on my 2000 ford focus.  found a yellow substance with a gas smell and looks like oil on the air filter.  whats causing this?  also the substance is in the air filter compartment that holds the air filter.

1 Answer

299,075

You might be getting blow-by of oil. Change your PCV valve and clean up the oil and gook. Since it is yellow, I assume you are driving very short trips not allowing the motor to fully warm up.

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