[MidNightRidersI]

I know I'm gonna get shredded here by asking this since there are probably a ton of threads covering it, but I more than anything want to know if using a Non-OEM (MOPAR) fuel filters really matter? Are the "knock offs" sold on Amazon (Like iFJF) really sub-par? I am changing the oil at the same time, so I am trying to keep my costs down... With that should I just stick to T6 10w-30 as I am in California with non-sub 0 degree weather. Anyone used FleetSupreme by TRiAX? says its fully Synthetic API CK-4 Heavey duty Engine oil, but never heard of it. But, this is my first Diesel. I've always used Mobil 1 fully synthetic in my vehicles. My buddy uses Royal Purple but only thing I could find is CI-4 oil... Any help would be appreciated

 

[MidNightRidersI]

Thanks everyone I went with OE fuel and Fleetguard oil filters. Still confused with the oil though. I live in California and am finding it hard to find 10w-30. Does running 5w-40 affect the milage? And what is the difference from T5 and T6 Rotella. Thx.