- First Name
- Don
- Joined
- May 20, 2023
- Threads
- 45
- Messages
- 423
- Reaction score
- 477
- Location
- Upper Peninsula MI.
- Vehicle(s)
- 2023 XLTHybrid
- Engine
- 2.5L Hybrid
Believe or not in the 50's they oil filters that used toilet paper and they worked.The FL400 has a 21psi bypass valve while the FL910S has a 14psi bypass valve meaning that while you may get "fewer" bypass events, if your oil is super cold it's not flowing enough through the media and the bypass isn't kicking in at 14psi like it should be to flow oil to your engine. Ford specd the FL910S for a reason, especially on the 2.0 Ecoboost but in really really cold conditions you're probably seeing oil pressure in the 70-80 psi range anyway which means you're in bypass no matter what filter you run.
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