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Power Strokes
6.0 Aftermarket
mpg drop with reg return..
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[QUOTE="windrunner408, post: 381449, member: 1868"] Yea that 5w-40 is GREAT oil for sure. That is awesome that it'll run at -15F. I don't ever see temps that cold but I still use 5w-40 even in this 100F+ heat that I am in down here in TN. Yea running your fuel pressure between 60-65psi is just fine. There isn't any need to go over 65psi. IMO, your fuel system will keep up and maintain fuel pressure above 45psi at WOT or it wont, regardless of where you set your fuel pressure. I also think you need over 40psi to keep your injectors from cavitating and causing wear. JMOs though. [/QUOTE]
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mpg drop with reg return..
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