I let my friend borrow my 2016 Dodge Ram 1500 Hemi 5.7 Liter and he filled it up with 4 to 5 gallons of diesel. It is relatively new with less than 200 miles on it. I read somethings online that said "fill the rest of the tank up with unleaded gas" which I have half a tank I can fill with it.
Another said "dump the gas tank" but I contacted the dealership and that's going to cost me around $600 bucks. Anyone know if filling the rest of it up with unleaded will help?
Spend the money and have it done, Tow it to the shop where repairs will be made.
You afforded the new truck, you can afford to do this.
Cheaper, in the long run.
DO NOT attempt any repair or fix, by yourself.
No offense intended but the fact you asked the question, HOW TO, means you do not know enough, not to blow yourself to kingdom come.
As for letting a friend borrow a new truck, why the hell not?
It's just property, which can be repaired or replaced.
Though, it should be your friends responsibility.
He did it, let him be accountable for his actions.
Good "Life" Lesson there....