The so-called "junk" refrigerants worked as well as the others in my W123's. The biggest problem is the car and system, not refrigerant type. Get over 90, sit and traffic or even stop at a light and it just doesn't matter.
Better cure was my '95 with factory R134a and a better system.
Best cure was a far more reliable brand......
Just sayin'......

__________________
Jimmy L.
'05 Acura TL 6MT
2001 ML430 My Spare

Gone:
'95 E300 188K "Batmobile" Texas Unfriendly Black
'85 300TD 235K "The Wagon" Texas Friendly White
'80 240D 154K "China" Scar engine installed
'81 300TD 240K "Smash"
'80 240D 230K "The Squash"
'81 240D 293K"Scar" Rear ended harder than Elton John