Duck assassin

Wow ATF that sounds rough,

Chrisreyn

Well, its NOT designed to burn in an engine, actually , its the exact opposite!

You can add just about ANYTHING to diesel fuel and these trucks will still run.
The reason for using two-stroke oil is that its designed to burn in an engine, where gear lube, ATF, and even used motor oil are not, so 2-stroke oil burns cleaner while lubricating the pump as it goes through it.

The danger of using used motor oil is that its already been running around in someones engine. What type, size and quantity of particles has it picked up along the way? If you decide to burn it, it MUST be filtered before you pour it in the tank. I mean odds are you'd just clog your fuel filter running it without filtering, but as expensive as rebuilding an engine or a pump can get, why risk it?
again, there are numerous threads about this in the General and Fuels forums you can read to get more info.

9812vram

Diesel fuel itself doesnt burn completely. It leaves carbon deposits behind all over the place including the engine oil. So if the thousands of liters of diesel you go through leaves its unburnt avrasive deposites all through the engine year after year, then whats the incrimental deposites left from a couple litres of WMO, ATF or whatever going to hurt?

Also, its the synthetic ATF's you need to watch if you want to be worried about additives not burning completely and I highly doubt guys are pouring a couple $12/litre synthetic ATF's in the tank every fill up! the Dextron 3 the "old timers" used is still Dextron 3 today, and its cheap. Ashless 2 stroke oil was designed for emissions and so the muffler screen on your weed eater wouldnt plug up as easy. Interesting thing there - if gasoline and 2 stroke oil are both "designed" to burn, what does the muff screens on your weed eater always plug up with? Answer - Carbon deposites. AKA unburnt fuel and 2 stroke oil.
2 stroke oil lubricates. ATF lubricates and cleans. You could lubricate and clean with your favorite fuel conditioner and fuel system cleaner also "designed" to burn, but guess what? Put some in a pan and light it on fire - they both leave deposites behind when the fire goes out, just like everything else you can burn in a diesel. So the whole "doesnt burn" and "will leave harmful deposites behind" is kind of a bum theory because diesel fuel itself does just the same.