2004 Mazda 6 oil in air filter

2004 MAZDA 6
117,000 MILES • 6 CYL • FWD • AUTOMATIC
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KASTONE62
  • MEMBER
  • 1 POST
I had my oil changed and they found the air filter had oil on it. What would cause this?
Jul 18, 2009 at 8:52 PM
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MHPAUTOS
  • ✓ASE Certified Mechanic
  • 31,937 POSTS
  • ASE Certified Mechanic
Hi there,

This is normally due to excessive crank case pressure, have a leak down test done to check ring condition and get the PCV valve changed, start here.

Mark (mhpautos)
Jul 18, 2009 at 9:04 PM
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