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Freeze 12 an acceptable alternative to R134a?

Heating and Ventilation

Vehicle Information: Model: 911 Carerra; Year: 1987; Body Type: Convertible; Engine (type, size, modifications): 3.2 L; Total Mileage: 45,000;

I have a totally acceptable A/C system running R12, but the annual recharge is getting costly.A local Mercedes/BMW independent garage has been using a new product call "Freeze 12" as a EPA legal, direct replacement to R12. (See http://autorefrigerants.com/freeze12faq.htm). The FAQ's on the website and the local garage swear it's better R134a (lower pressure and lower cost, ect.)Given a stock 911 A/C system, what are your thoughts? Has the Porsche community used this product? Is there any downside to "evacuating the R12" and "trying it"?

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