Auto shop owners know that air compressors are the backbone of many day-to-day operations. From running impact wrenches to inflating tires, a reliable air compressor makes the job easier and more efficient. If they’re in the market for a 50-gallon air compressor, they’re probably looking at models in the 5 HP to 7.5 HP range. This size provides the right balance of power and tank capacity, typically delivering anywhere between 15 CFM at 100 PSI to 28 CFM at 100 PSI, with a max PSI of 175. That’s plenty of airflow to keep an auto shop running smoothly.