Some of you may recall from my last post "Truck Won't Start... ... Sometimes" Well, it's fixed. After 5 dasy and a new ECM I'm up and running, and running quite well I might add. The dealer treated me real good, while it was in and once the new ECM was in I had them do teh cold weather start-up update for me. Now the truck is running better than ever. Last night I got my best economy ever. ran right at 20mpg. On a 60 mile stretch that is hills and small towns. I'm happy with it!! Not sure if it was all my new ECM, I also tried a fuel addative from Stanadyne. I've been told it some pretty good stuff. I figure I'll run a bottle of it every 1000 miles or so to kepp everything cleaned out. That pretty much equates to a 1/2 a bottle per fill-up. Anyone else have any experience with Stanadyne? Would like to hear other's thoughts.