I have been testing the use of PoweUp NNL690-G in airconditioning units since 1996. I first started with my Dodge Caravan the air conditioning unit was not working. I made a decision to put into opertion even though my van had 180,000 miles of use. I went to a repair shop in Marinette Wisconsin called Don Adams Service. He replaced all the hoses and all other need components except for the compressor. Don & I started the engine and the compressor was extreamly loud and running verry hot. Don thought I could not go a mile before it would fail. At this time I had Don install PowerUp NNL690-G as a oil replacement along with R12A freon. I thaught this would be a good test for our products. We started up the engine, the compressor noise and tempeature began to drop. I would have to say the noise level droped about 50% and the tempeature droped about 40 degrees. I drove out the and continued on towards home. I tested this appliaton for a little over 3 years with no failures. However I was tired of listening to the noise and installed a new compressor with another treatment of NNL690-G. I have also been testing other freon applications, R134A, R404A. The results of R12A, R134A & R404A have been a reduction of operating tempeature and noise levels.
PowerUp NNL690-G has proven to me and to my customers to be an excellent oil repalacment in freon applications.
Yours truly,
William N. Mongin