This is why. Northstar is fucking junk. 04-09 has a 3.6l V6 or a 4.6 Northstar. That V6 came in just about anything under the sun for GM, STS, Malibu, G6, G8, Torrent, etc. 10+ had a few improvements from what I read.
I'm onboard for a Diesel VW. Has everything you want with the resale.