Loosing engine oil

Reply Subscribe

Thread Tools

Search this Thread

May 20, 2025 | 08:15 AM

mookie1

Thread Starter

Trailering

Joined: Dec 2003

Posts: 15

Likes: 0

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

Lead Driver

Joined: Jun 2004

Posts: 6,357

Likes: 593

From: Amarillo, TEXAS!

What year/engine?

May 20, 2025 | 09:08 AM

F250_Super_4X4

Laughing Gas

Joined: Mar 2016

Posts: 1,086

Likes: 466

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

Thread Starter

Trailering

Joined: Dec 2003

Posts: 15

Likes: 0

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

Posts: 1,086

Likes: 466

From: Tennessee

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

May 20, 2025 | 09:23 AM

speakerfritz

Hotshot

Joined: Jul 2013

Posts: 14,293

Likes: 2,197

Is there an increase in dpf build ?

May 20, 2025 | 04:15 PM

mookie1

Thread Starter

Trailering

Joined: Dec 2003

Posts: 15

Likes: 0

Stock , dpf usage is same.

Top 10 Fords at 2026 Carlisle Ford Nationals

Joe Kucinski

3 Best / 3 Worst Parts of Modern Ford Ownership

Brett Foote

10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches

Pouria Savadkouei

Every 2026 Ford Engine Explained

Brett Foote

10 Ugly Ford Trucks That We Still Kinda Love

Joe Kucinski

10 Things Every Truck Owner NEEDS (2026 Edition)

Michael S. Palmer

Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath

Verdad Gallardo

Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer

Joe Kucinski

2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)

Brett Foote

Top 10 Ford Truck Tragedies

Joe Kucinski

May 20, 2025 | 04:51 PM

mookie1

Thread Starter

Trailering

Joined: Dec 2003

Posts: 15

Likes: 0

No oil in coolant.

May 20, 2025 | 08:37 PM

#10

INFRNL

Cargo Master

Joined: Apr 2012

Posts: 2,029

Likes: 530

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

Posts: 46

Likes: 30

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

Thread Starter

Trailering

Joined: Dec 2003

Posts: 15

Likes: 0

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.