Hyundai oil less Compressor Review 

Thanks for a good review Steve appreciate you taking the time...

Just as a thought, temperature change will have an affect on the pressure.The compressed air initially will be hot, when the air cools the pressure will drop sightly.

Somewhere on that tank (by law) should be a lot of information on when it was pressure tested and to what pressure etc.

I once thought about buying such a compressor, but after reading reviews and hearing about people's opinions that such a compressor lasts about 60 operating hours and then requires engine overhaul, I gave up on it.

Spot On

11 cfm is the displacement, the fad is the delivery at the tool. I can spray the whole side of a car with a lvlp gun using this compressor.

Ptfe tape on fittings

Hi, if you really like to be accurate without the math, fill up the tanks with water and empty it to another bigger barrel. cheers

These compressors don't use pistons, they are diaphragm compressors, they use rubber diaphragms hence they don't need lubrication.