Thanks Joe.....smaller cars use smaller amounts of gas because they can. If we could all take 2-2.5 lbs compared to 3.5-4 lbs for our bigger systems we wouldn't have as much to condense and cool to make our ride comfortable. They can do it because they are not only running much less gas, but more efficient compressors etc. Which is something I should've have brought to the discussion. It's a shame that it has taken the manufacturer's so long to ge us something to work for our cars. By the way, wanna open pandora's box? Did you realize the 134 is more harmful to your health, the ozone layer and more disruptive to our eco system? Food for thought. I like getting thought processes going further.