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Discussion Starter · #1 · (Edited)
Hello all, hope everything is well.

Well i am at a cross roads here on my engine. I am losing oil at a higher than normal rate. The stick was almost dry the other day on level ground and was within halfway of the service interval for oil changes.

So i changed the oil again. Checked the oil a couple of days later and im already half way on the threaded area of the dip stick. No leaks on the block anymore and Ford topped it off. My coolant overflow stays below the minimum mark warm or cold. Oil doesnt smell sweet or look milky. No blue smoke, had a witness check.

I have a 2016 Ford Focus ST @ 37575 miles

Oil Intervals: Every 4,000 miles i do full synthetic. Usually Castrol Edge or Amsoil since ive been having oil loss, ive moved the service schedule sooner.

Oil Filter used: Motorcraft FL 400s or 910s

Mods:
Depo 5.5 FMIC
Green Filter
NGK 6510 Spark Plugs
Mountune Turboback Exhaust
Cobb AP V3

Tune:
Stratified Stage 3 Flash

Tune Issues:
No issues anymore, DP was leaking but fixed. However my Cylinder 3 Neg Corr and Knock sensor will pick up -6 to -4 under light accelleration. Ruled out false knock after checking, runs perfectly fine under load or WOT.
 

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Class three leak? Was you're car hemorrhaging oil? class one leak: small drops of oil every now and then, Class two leak, "uhoh im leaking oil I better get it in now", Class three leak: "AAAAAAAAAHHHHHHH! OIL IS SPRAYING EVERYWHERE!!!"
This is how the army taught me about different classes of oil leaks.

Do a compression check on all four cylinders. Closer inspection of the head, gasket might be bad. Check oil gasket, might be bad. Check oil feed line.

Keep us updated. Throw us some pictures please
 

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Discussion Starter · #4 ·
Oh lol its not that bad, I forgot its the other way around with Oil leak classes. I should know, I was a 7-Ton MTVR operator in the Marines, we also worked on them because budget cuts.

Here, I'm going to scan all my service records and post them up. If you all need anymore info, let me know.

I do drive aggressively and boost a lot so maybe its from that, idk. A lot of people do that with this engine and don't have issues.
 

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Discussion Starter · #5 · (Edited)
I have a apt with Ford again on Monday. I can bet that its a intake valve seal in Cylinder 3 leaking oil into the combustion chamber.
 

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Discussion Starter · #6 · (Edited)
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