I really dont think the brand of air tool oil really matters all that much, I mean Cmon, any airtool oil is better than no oil and I know plenty of guys who never oil thier airtools and they keep on goin. I have heard it's a goood idea to run PB blaster air tool cleaner through air tools every once in a while though to clean them out, but mine dont get used often enough. I have no idea how or why I have so much air tool oil aroudn the house though. 2 bottles in the garage, one downstairs and one in the viking drill kit. I only recall buying one of these bottles haha. They really do last forever. In case anybody is wondering, 2 of them are Husky brand, one is kobalt from lowes and the other is made by shell for viking.
Id say go for the husky simply because the spout on the bottle is nice for not making a mess everywhere like most other types. The snap on stuff doesnt smell or look any different than the rest of it and honestly its liek 1/4 as much for 4x the price
Jim