I have a black oil on air filter when I changed it??

Asked by Mar 02, 2013 at 09:39 AM about the 2007 Ford Explorer Sport Trac Limited 4WD

Question type: Maintenance & Repair

3 Answers

99,235

It took a while and I think you meant to type "I have black oil on the air filter when I changed it". -- That's sort of normal. Engine vapors are sent to the intake to be burnt as part of the emissions system.

Ditto. Tenspeed is right. The PCV draws clean air from that canister

8,615

There should be a filter in line to prevent that much oil from backing up. What you don't say is how long it has been since the filter was changed. If it has been a LOT of miles, then sure, it could be normal. If it is only a fairly short while, like under 10,000 miles, then there is likely something wrong, and my first guess would be that you have engine blow by to a very significant degree.

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