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2018 3.5 Ecoboost 78000 miles
Just started to make a noise when first starting up after sitting over night or after sitting a while all day. Noise sounds like low oil or metal on metal. It only last a few seconds then goes away. Ford dealer just changed oil. So not low on oil.
I'm thinking, time for Lucas oil treatment. Had a 1999 F250 with V10 same problem. Lucas oil treatment solved the noise.
I know bandaid the problem but lasted over 250,000 miles. Any thoughts?
 

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Cam phaser rattle. There's a "field service action" for it. See your dealer for replacement, but you could be past their mileage.
 
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