Don't need to do anything fancy just switch to synthetic, pretty much anything off the shelf that isn't super specialized will mix fine with conventionals. I've been running mobil 1 synthetic oil in the truck since i bought it (used with 76000 miles), then switch to the extended performance mobil 1 when they released it. Read my sig, everything in the truck is synthetic. I have an open element filter but no exhaust, which i'm hoping is the problem cause my mileage sux. I get about 10 city, and 15 highway (@ 70mph).
2007 Dodge Ram 1500 Quad Cab Big Horn 4x4
Yeah, it's got a HEMI!
Pretty much stock for now, still way better than my 98