i was wondering you guys think this would be good enough for working on my car with i used some before were they suck i want one strong enough to loosen lug nuts motor mounts esp crank pulleys?? what u guys think

 

That will be fine to run an Impact, but might cycle frequently.

The bigger part of the equation is the impact gun itself. I prefer Ingersol Rand, and their quiet series guns are great, I bet the hell out of mine and it still works perfect. Most of the mechanics in our shop here use them as well.

 

That small of comrpessor will run air tools however you will be putting much strain on it as it wont be able to keep up. I use a 2 stage 17.5cfm @150psi and 19.5 cfm@175 psi with an 80 gallon tank. I use snap on impact guns and ingersoll rand air wrenches, never have issues at all with either of them.

The moeny spent on a good compressor and tools is well worth it, as when you go to use them you dont have to stop every five minutes(or less) and wait for the comrpessor.