Freon R-12, as many of you know, has been discontinued because of its ozone damaging properties. The good news is that the replacement Freon, R134, really works! Contrary to popular belief, it works very well if the job is done right. If you like your car and plan on keeping it, the R134 conversion can save you a lot of money down the road. It gets confusing for a lot of people because of the multitude of different replacement types on the market. However, if you stick to R134 you can’t go wrong. R134 is what the new car manufacturers are using and nothing else.