For use with Spotgun, the world's most popular and professional injection method. Pull the trigger to inject a precise amount of oil and you're done! Today's vehicles require precise amounts of oil. Spotgun oil cartridges utilize the Spotgun injection system to inject a precise measured amount of A/C Oil while eliminating moisture contamination in the oil. PAG 46 oil – (6) cartridges (8 oz/240 mL)