oil filters what do u use and why

My '99 Durango 2WD 318 has 192,*** miles (and climbing daily) and I've ran QS Defy with a Fram filter (Walmart :D )! I change oil every 5000 miles. No problems at all, and the oil pressure gauge is as far to the right as any Durango/Dakota that I've ever been in, including my Dad's '94 Dakota that he bought brand new! Not saying it's the best care, I know there is better oil (and filters), but it will rust away before I wear it out. Rust is showing up all over now, but the motor runs great and the tranny works good too. In fact, only repairs thus far are the water pump and two front hub assemblies. But hey, it's a 318......... :)