Originally Posted by 05CrewDually
I use to run ATF in my older diesel. I also ran used motor oil mixed in the fuel. Usually 2-3 gallons of oil to 19 gallons of fuel. I always have my fuel receipts. Visually it just turned the diesel fuel darker brown to black depending on the ratio.
The ATF is an excellent detergent and lubricant compared to ULSD. Many run a quart per tank. Another popular additive is 2-stroke oil in diesel fuel.
Well it's been years since I've heard that. But back in the day of non-computer motors we always ran oil, transmission fluid in our tanks. In below 10 deg we used to cut 40 gal of diesel with a couple gallon or so of gas to keep fuel from gelling.
I ve never heard any of that going on with the computer engines ?? Might work. Not sure about the transmission fluid tinting the fuel either. Been years since I've heard of fuel tanks being checked too. Much less an RV tank.
So my thought is if one is so inclined to uses transmission fluid I guess it never matter as you will not be checked.