Just roll yer own...or not.  I also live in the WA province of Cascadia,
and I'm not aware of any enforcing agency sniffing around for refrigerants
in vehicles.  Bottomline, do what best makes sense for you, your conscience
and your vehicle.  All I can say, is the stuff works quite well in both my
van and Mercedes.  It's also nice as a test refrigerant for vehicles with
unknown AC systems that you want to examine with a temporary "top-up",
since it can be added to either R12 or R134a systems.  That's what I did
with my van...except since it performed so well, I just left it in there on
top of some residual R12.  YMMV

On Thu, Apr 12, 2012 at 11:55 AM, Loren Busch <starwagen@gmail.com> wrote:

>  RE: "Flammable" Refrigerants
> If you read through the various spec sheets/regulations etc.  you will find
> that in fact the alternatives to R134 are legal and do get used in heavy
> equipment, farm equipment, etc.  Off road stuff.  That's how they are
> staying in business, that's the market those products are aimed at.  They
> are "Not Approved" for passenger vehicles but not banned (except for some
> states like my own Soviet of Washington). And IIRC there is a provision
> that allows them in passenger vehicles IF they have previously been
> converted to R134.  And I also recall reading through the government spec
> sheet on a whole bunch of refrigerants and under flammability the entry
> said "Not Tested" for those containing butane so we don't really know if
> there is a hazard or not!  Maybe someone that is about to use some of this
> stuff in their Vanagon could do a test (see YouTube under 'hair spray and
> lighter') and tell us what the result is:)
>

--
Casey