Freeze-12 is a blend of R134A(80%) and R142B(20%). With that said, one would wonder why not just move to R134A?
Freeze-12 also requires a special tap to install. The supplier of the product(somewhere in Calif) gets about $20-$25 for the special tap. After you do all of the math, the cost isn't justified. If you want R-12 efficiency, stay with R-12. I've read good and bad about Freeze-12.
My 2 cents.
1991 300-SEL - Model 126
M103 - SOHC
James Madison - Oppressors can tyrannize only when they achieve a standing army, an enslaved press, and a disarmed populace.
Liberty Firearms Training - After years of trying to regulate California criminals with a never ending stream of gun control laws they have still not given up with the belief that if they make something a crime that criminals will miraculously start obeying the law.