I normally take it to a quick lube and get valvoline 10w-30, but decided to start doing it myself, so I got 5qts. of valv. maxlife syn-blend 10w-30, 1qrt. Lucas oil stabilizer and a Fram tough guard filter. I know some are gonna start slamming the fram filter right off, but I've used them for years and alot of my friends do and never had any problems. What I'm curious about is the Lucas oil stabilizer. I was told by several friends that it is a fantastic product and I should use it, any one on here use it? What kinda results you get? I heard it can even help the mpg. Another dumb question, but the 5.2L 318 takes 5 qrts, not 6..right?