I drive a 1995 model truck (Nissan) with R-134 and my observation is that it works very well after being used every day (even winter) for seven years and 120k miles. However, it recently quit. It turns out that a hose had split, depleted the system of refrigerant and ruined the receiver/drier (corrosion). Replacement costs amount to $50 for the receiver/drier and $80 for the hose....AND $4 a pound for R-134. Not terribly pricey. Bryan St.Mary Too many Imperials! In a message dated 7/4/02 12:18:02 PM Pacific Daylight Time, SpicemanII@xxxxxxx writes: << I have been at several air conditioning shops and they say that R134 is on its way out. New cars with it go about 4 to 5 years. Then it is so expensive to replace the items, the customers just sell their vehicle. >>