No alcoholic should EVER have a car that WE furnish. He could easily kill himself or somebody else while drunk and end up in prison for manslaughter. Or just pile up the DUIs and get tossed in jail. If you pay for his car, in any way, get him a bike, tell him to walk, tell him to find a job near him. He shouldn't be on the road. He is a danger to everyone else AND himself.
More hugs.
P.S.--Short text him only. "I decided it's a bad idea." Period. Ignore his angry texts afterward. Don't even read them. He's going to be furious that you cut off his best source of booze. Yes, he'll say you lied, blah, b lah, blah. We all have a right to gain knowledge that changes our minds. You don't need to explain it to him though. That will only throw oil on the fire.
I do mean this gently. Do not think I am yelling at you. I know it's hard, but i's necessary 
