Suggestions for a compressor

[koenbro]

Hi, new user here. I am a weekend mechanic and am looking to buy a compressor. The main goal is to use impact wrenches and other air tools on a car. Never used a compressor before, but seems that 5cfm at 90PSI is a must.

Have narrowed the choices down to a DEWALT 15-Gal. Portable Electric Compressor (Model #D55168) which is available at my local HD. Just noticed that there is a smaller version that is also capable of 5cfm at 90PSI but with a much smaller tank (4.5 vs 15 gal).

As an amateur do I need the bigger tank? This isn't as much about money (only $40 difference) or noise (they are rated the same at 78 db) just wanted to get more informed about my choices.

Much appreciate any answer.

 

[PBCampbell]

Given the cost on those portables and your stated use, I'd be looking at Stationary compressors of 3hp or better 5hp with a 60 or 80 gallon tank. If you absolutely can't swing a stationary those portables will do some work, although briefly and with some frustration.

 

[johndeereman]

BUY what your budget allow's but THE BIGGER THE BETTER the larger tank will give you a volume advantage.

 

[skruft]

The larger tank is helpful if you have space and do not need much portability. You need a fair amount of storage of air, not a lot, to run an impact wrench. Read the internet for requirements. Buy what you need for the future if you can afford to.

I would not buy an oilless compressor except as a small portable, and then only on sale.

My first compressor had 20 gallons and was still going 35 years later. I wished I had gotten a 30 gallon tank, which was not much more money, but 20 was usually adequate. It had to run a lot when I needed plenty of air, like to blow out my large sprinkler system.

In my opinion you do not need a very large tank (like the 60-80 gal) unless you will run more than one tool at a time or very "hungry" tools like sanders or some HVLP sprayers.