Hi all is there any chance of the usage of r413a(r49) in a r1234yf system seeing as is ludicrously expensive and all cars seem to be heading that way?
Or is it down to oil again?
Sorry if this has been reposted I've had a google and not getting far it seems that you can put r1234yf in a r134a system but not the other way around I was wondering with the flexibility of r413a If it was dooable?

Or am I barking up the wrong tree?

cheers?