I went out on a limb, and had 4.5 gallons of ATF lying around in my shop bay, and at diesel being 4.25 per gallon i decided to try something. I had a half tank of fuel in the rear tank, which is around 7 gallons. I put 4.5 gallons of atf in there, and the truck ran great, no issues with hard starting, no smoke And an even smoother idle. I'm still running it, and was considering running a 50-50 mix trans fluid and diesel for long term use. Anyone doing this? any good experiences? bad experiences? that would cut fuel cost to around 2 dollars and change a gallon.