I'm new to the site and not tryin to start a pissin match about who's big oil is better. But what I am needing some help with is figuring out which setup to go with. I have a 2003 7.3 with those stupid PMR's so I know that 400 hp is the limit. The question is Stage 1 sticks with big oil or keep stock oil and go with stage 2's. My other question is how much power will big oil give. Has anyone dyno'd with stock oil and then big oil??? I know that big oil accomplishes the same effect so please no brand a is better than brand b. I would also like to stay under 400 hp so that the rods arent being stressed out all the time.