diesel in oil crankcase??

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Feb 5, 2026 | 09:18 PM

jas415

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Junior Member

Joined: Aug 2011

Posts: 2

From: Texas

diesel in oil crankcase??

2015 F250 and over about 4-5000 miles it makes about a quart of diesel in the crankcase!! Is that a bad ccv, or something different? Runs great, no strange sounds or other!

Feb 6, 2026 | 06:34 PM

hanky

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Joined: Jun 2010

Posts: 16,607

Have you noticed any black smoke from the exhaust on startup ?

Feb 7, 2026 | 05:46 PM

jas415

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Junior Member

Joined: Aug 2011

Posts: 2

From: Texas

No but I will check that. This just started about 4 months ago as the oil change the previous time was good.

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