I have tested what I get from Sam's multiple times. It is 97-98% pure R152a with 2-3% unidentifiable. It has an embitermint in it to prevent substance abuse. In the 6 years I ran it, no ill effects noticed when I rebuilt the system. I only rebuilt the system because I had it apart and it had a noisy compressor even before the R152a. R152a itself is mildly flameable but less flameable than R1234YF. The YF has lower ignition temps.88F on the suction side? Why 88F, was the rear fan blowing on high?
Not the result I had hoped-for.
How does one know the R152 isn't impure, too?
Walmart's house brand of R134a is $8.88/12oz locally. I needed R134a in a pinch this weekend (I have multiple 30# cans at home) so I bought two. The result was very cold air on my S10.
Five cans of this would give you 60oz for about $50. Not as cheap as R152.