Impact Drivers

[basement]

Santa brought me an air compressor this year but in typical chain store fashion they included a less then top quality tool kit. Well I went out to the garage to do some playing around with it and the ratchet lasted about three uses and then it simply stopped running. Now it just sits there and won't drive in forward or reverse direction. It was abit on the chilly side, maybe around 32F and also before running it for the first time a put several drops of air tool oil into the fitting. I brought the air ratchet inside to warm up and will try it again tomorrow before heading back to the store with it. My question is, I was running maybe 35-50psi when it was working, is this too much pressure? Also, is it common practice to use oil in the tools?
Later

[basement]

Went out this morning with said ratchet and it started working. I was trying to remove some 3/4" bolts from the bumper so you can imagine how rusted they were and the ratchet refused to budge them. I loosened them with a breaker bar and only after the nut was nearly all the way off the bolt was the air ratchet able to turn them. Is this normal for an air tool, even  tried cranking the psi up to 75?

[Chryco Psycho]

most air tools operate on 120 psi , 100 minimum ,  oil them regularly
 air rachets are not designed for heavy torque , you need an impact for that

[basement]

Thanks Chryco