The best possible thing for cooling performance and system integrity in a R12 system is still R12. This applies especially to small cars with tiny condensers.
Special for members here! I can recharge your terc with the good stuff for $100. This price would apply to any other smaller car that holds 2 lbs. or less. The system must be intact still. I won't charge a leaky system. If the system needs repair I can perform or advise should you want to fix it yourself.
R134a recharges are going for $50 with no capacity limit.
Located in the twin cities.
Sorry if this post seems a little spammish, but I guess I am offering nipple enhancement.

acrecharge@yahoo.com