Originally Posted by GTobey
Please, whatever you do, never- never- never add gasoline to diesel fuel!!!! Especially gasoline with ethanol! Recipe for disaster, and a quick trip to the shop for fuel injection system repairs/replacement.
We certainly did this for years and no ethanol for darn sure, and never had any issues on quite a number of different diesel engines. I don't recommend it now and there is no reason when you are prepared for travel. This was something that was done on the farms and ranches with bulk tanks that had fuel already delivered before the switch was made to winter fuel. Best bet is to buy treated fuel and if in doubt add a quality product. It was just a way to treat hundreds or thousands of gallons of fuel easily and cost effectively. Same if you had #1 fuel on hand that you could pump and blend into the #2 tank.
Sure didn't want anyone to try that now. There are many cases of folks pumping DEF into the fuel tanks and creating major issues out there and then wanting the warranty to cover it. Would be similar to that if you misjudged the quantity or left the pump running.
Going to have to be careful sharing anecdotal past experiences.