I have a 2015 RT that I have repaired after an accident. Had to put a new condenser in it so I need to completely recharge the AC system. I've found that near me only the dealers are recharging r1234yf systems, and the price is ridiculous - like over 5 times higher than a 134 system. After doing some research I have discovered that r1234yf is not nearly as efficient as r134a and can even leak out of the system if it experiences long periods of cold weather. In other words, it's just more overpriced EPA garbage. I also discovered that it seems that you can run r134a in the new systems. Most shops won't do it because they would be breaking some environmental regulations, but there is nothing stopping a DIYer from doing it. Wondering if anyone has done this. I know I have seen posts previously with people's systems not cooling well anymore - likely due to the leaking systems - so I figured that someone out there may have experience with this conversion. As far as the system itself is concerned, it looks like everything is the same with the exception of the addition of a heat exchanger and a more stout condenser.