I'm trying to pick a 5w-20 oil to run in my Scion XB and I'd like to pick something and stick with it. I plan on changing the oil every 5,000miles to comply with the factory warranty, so I'm gonna stick with conventional, unless I can find toyota 0w-20 cheap enough around here. anyways, If you guys had to pick between PYB, Havoline, or Motorcraft, which one would you guys pick?