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This is a photo of a China after market fuel filter, my self I sure as heck would not want that thing in my truck but you an use what ever you want: As for oil have run Rotella T6 5w40 in temps between 30 below zero to 105 above, its safe to use year round no matter where you live in the USA...

 

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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.

Rotella T5 is a synthetic blend, T 6 is full synthetic oil, I prefer full synthetic oil over a blended oil and have for the past 25 years, some people report a small increase going from dino to synthetic, but your right foot has the most control over your fuel mileage...