Stay with R-12. All of the good reasons have already been stated.

i guess everyone has forgotten the basic issue here.R12 EATS HOLES IN THE OZONE LAYER!reason enough for not using it.be responsible to the rest of the human race

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michael cole 1980 300SD gone now but not forgotten,87tdt,90 300te 4matic 95 e320 wagon

Let's assume for a moment that R12 really is that nasty to the Ozone layer and assume that the loss of the Ozone layer is indeed due to the release of R12. To begin with the vast majority of the R12 that has reached the air has been from aerosol cans BEFORE such propellants were outlawed. It was a relatively small percentage that came from auto a/c systems.

The number of vehicles left on the road today that were originally designed for R12 is a VERY small percentage of the vehicles on the road. In the overall scheme of things, the amount of R12 that will go into these cars in the coming years is MINISCULE as a percentage of all refrigerant pumped into the cars using 134. It's not as if 134 is totally clean. It emits about 10% the amount of what you consider the poison components of R12.

It's a numbers game that with every passing day is moving in favor of you Green folks. Every single day, bunches and bunches of the cars that use R12 are hitting the wrecking yards where the refrigerant is recovered.

Believe it or not, the fact that I continue to use R12 in cars that were designed for it will not matter one iota as to whether or not there is global warming. BTW, I have an R12 Recovery/Recycle machine and handle the stuff responsibly.

Also, are you aware that the temperature since 2006 in the US has actually DECREASED? Those who preach global warming are basing their theories on only about 100 years of data. How long has the Earth been here?

I don't understand why components in need of replacement have anything to do with what refrigerant is chosen. If a component needs replacing, it needs replacing and that's that. How does that have anything to do with refrigerant choice?