[Nodnarb76]

Always compared it to a newer car/truck that will loose a couple mpg when the A/C is on, never thought about it being a 1/3 drop in fuel economy. I did run it mostly on really hot days when my kids are in the truck with me and we weren't moving fast enough with the windows down to be comfortable.
Either way that is all out of my life now, the LS swap with a Saden compressor should make a noticeable difference.