Several small components in your car play a crucial role in its smooth running and better performance. Among the various components the air filter is responsible for filtering the air before it enters your engine for the complete combustion of the fuel. However, if there is leakage of oil into the air filter, then it can seriously affect its functioning and also damage other parts. Go through the slide to know the reasons behind oil seeping into the air filter.

1. Reasons behind the Oil
Seeping into the Air Filter

2. When the engine runs,
pressure buildup in the
crankcase.

3. Excessive blow-by in the
engine may cause issues
like:
Reduce fuel economy
Weaken horsepower

4. Blow-by burns
differently and hard for
sensors to measure.

5. Throughout the process,
the oil may enter into the
air filter.

6. Go through the points to
know about the reasons
behind it.

7. Damaged PCV valve

8. PCV valve in car redirects
the blow-by back into the
air intake.

9. Like an oil filter, the PCV valve
also needs replacement.

10. Damaged PCV valve also allows
more oil into the air filter.

11. Broken piston rings

12. Piston rings provide a seal
between the cylinder wall
and piston.

13. Over time, several factors
broke the piston rings.
Such as:
High mileage
Improper maintenance
Running engine hard
Poor engine design

14. Broken piston rings may cause
several issues in the car:
Decrease horsepower
Increase blow-by
Deteriorate the seals
Enter more oil in the air filter

15. Reusable air filter

16. Sometimes, a reusable air
filter requires an oily film
on the filter exterior.

17. Oil on the inner side of
the air filter indicates too
much oil applied.

18. Before reusing it, follow
the filter manufacture’s
recommendations.

19. Blocked oil channels

20. Modern engine oil can last a
very long time than others.

21. Neglecting oil change
intervals make the oil thicken
and nasty.

22. As a result, it will cause
several issues in the car.
Such as:
Clog the oil channel
Reduce horsepower
Lower fuel economy
Failed the engine

23. To prevent the oil into the
air filter, add a catch can or
air-oil separator.

24. These devices collect or
filter gases vented from
the crankcase.

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