A/C ExtenDye Bottle (1/4oz / 7.5ml) Super-concentrated UV dye detects leaks quickly, saving time and money . Use the same quantity of A/C ExtenDye(TM) per application as our Universal A/C dye . Friction modifier increases lubricity (less friction) of the compressor oil, improving efficiency (friction coefficient) by over 50% and improving fuel economy . Anti-wear additive creates a film that prevents contact between metal parts; reducing friction and heat, thereby extending component life . Effectively quiets noisy compressors . Antioxidant stops the oxidation process, reduces acidity, and prolongs oil life B499012A No -