can i use 12a w/my 134a

[jeepsj]

No. Not even a little. They are totally incompatible.

Where are you that you have R12 available but not R134?

[Cusser]

Take to a shop; have the leak diagnosed and fixed, then the correct amount of R134a added by weight.

[jeepsj]

No. Not even a little. They are totally incompatible.

Where are you that you have R12 available but not R134?

near toronto canada.
not r12(the old banned stuff) but r-12a, almost same name but not the same
this stuff http://www.canadiantire.ca/en/pdp/red-t ... p.html#srp

That stuff is a mixture of propane and butane. Don't smoke around it.

[mk378]

Mixtures of refrigerant usually have undesirable thermal properties compared to either one alone. It is like when tin and lead are mixed to make solder, the resulting mixture has a lower melting point than expected by looking at the melting point of either metal alone. Thus it is highly preferable to use refrigerant as intended as a pure substance and not "top up" system with a different type.