<hjk> While we're on the subjects of residual pressure and alternative refrigerants, I have a tangential question. My Vanagon has some residual R12 in the system (~30psi), but I have no intention of attempting to procure more of that liquid gold. Can I top up the system with Cathey's hotsauce (isobutane/propane), or must I evacuate first? I've heard you're not supposed to mix refrigerants, but can these be added together?
that is all </hjk> Casey Olympia, WA Biodiesel: "I drive in a persistent vegetative state" '87 300TD intercooler #22 (216k) '84 300D (214k) Gashuffer: '89 Vanagon Wolfsburg Edition (187K) http://users.zhonka.net/zeitgeist/Misc/IMG_0171.JPG
