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I have the larger Motorcraft filter for my ST (FL-400s), and am planning to change the oil this weekend. How much more oil does the larger filter allow me to use? I don't want to overfill it.
 

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I have the larger Motorcraft filter for my ST (FL-400s), and am planning to change the oil this weekend. How much more oil does the larger filter allow me to use? I don't want to overfill it.
You can use a full 6 quarts with that filter.
 

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same here, I used that filter and a full 6qt on my first oil change to mobil 5-30 full synthetic at 2k miles.
 

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oh thanks for asking this!
 

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Easier
And running 6 quarts is better?
Easier to fill 6 than 5.7, and more oil increases dilution of particulates. It's not a bad move. Im 96k miles on an abused big turbo setup, lol.
 
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