A few years back the low pressure sensor went west in our ED Civic and so in having it repaired, the R12 (now banned) was replaced with R134a which has resulted in a cabin cooling system which feels like the same as placing an ice block in each vent and turning the fan on high. It has also caused the vanes in the compressor to rattle at idle. Is there a better gas to use that has the same cooling efficiency as R12 (with the exception of LPG) ? Could one retro fit a R134a setup into the ED from a slightly later model e.g. EG ? When we had R12 I must admit it was dam good though the car lost about 50% of its power !