I was going to be a smart ass and suggest laying off the throttle over the course of a few oil changes to see what improves, or else toss in a handful of friction intensifiers. But if you must have parts replaced there never a better source than the Flipmeister.
Im an Amsoil user. I also continue to use a Scotts permanent filter. I utilize a change-out for the entire 10k rating, and still use the drained oil in other equipment.