Loosing engine oil

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May 20, 2025 | 08:15 AM

mookie1

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Trailering

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Loosing engine oil

Changed engine oil and filter after coming back from a 2500 trip because having to add 4 qts of oil. I have no leaks and don’t see any smoke out the tail pipe. After the oil change it seems like I’m going through 1qt every 500 miles. Truck has 56k. Would a bad turbo blow it though the inner cooler?

May 20, 2025 | 09:07 AM

Pikachu

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Joined: Jun 2004

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From: Amarillo, TEXAS!

What year/engine?

May 20, 2025 | 09:08 AM

F250_Super_4X4

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Joined: Mar 2016

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From: Tennessee

Thats an awful lot of oil for no leaks.
Have you looked at the Trans bell housing? Possibly a rear main seal and the oil is collecting in the bell housing?
Are you running a CCV to atmosphere or exhaust?

May 20, 2025 | 09:14 AM

mookie1

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Trailering

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2016 F350 6.7
no leak at rear main. No spots under where I park it. This happened on the 2500 mile trip.

May 20, 2025 | 09:21 AM

F250_Super_4X4

Laughing Gas

Joined: Mar 2016

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From: Tennessee

Is your engine stock? If not what upgrades have you done?

May 20, 2025 | 09:23 AM

speakerfritz

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Is there an increase in dpf build ?

May 20, 2025 | 04:15 PM

mookie1

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Trailering

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Stock , dpf usage is same.

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May 20, 2025 | 04:51 PM

mookie1

Thread Starter

Trailering

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No oil in coolant.

May 20, 2025 | 08:37 PM

#10

INFRNL

Cargo Master

Joined: Apr 2012

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From: Bottom Of Pikes Peak

oil mixing with fuel possibly? but you'd think it would smoke?

May 22, 2025 | 02:43 PM

#11

PSI-op

5th Wheeling

Joined: Jan 2025

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My first thought is it was under filled to begin with. If it’s still low after a change though maybe that’s not it. A bad turbo would blow oil into the intake tract through the intercooler. I would remove the tube from the lowest spot in the intake where it joins to the intercooler. Some oil coming out is normal, but if it is a large amount I’d say you’ve found your issue. Next thing to check is to remove the oil fill cap with the engine idling. Does is have a bunch of pressure behind it that makes it “pop” off? It should not. If it does there is either a ton of blowby from bad rings/scored piston or the CCV is plugged up. I don’t think there’s any way that oil could get mixed with fuel on a 6.7, but I could be wrong.

Jun 8, 2025 | 09:15 AM

#12

mookie1

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Thanks for the reply’s. I’ve taken it into the dealer ( still have extended warranty) they did an oil change and are doing an oil consumption test. Every 200 miles needs to be checked at dealer.