Just wondering that how low of the PSI pressure can I go without losing power. I normally top it off when it gets down to 2500 PSI. I am sure I can go much longer.
As said above, if I’m paying attention I usually stop just before it gets to the reg pressure. If you forget, not a huge deal. You will see the speed fall off big after it goes below the reg pressure, and you will be well aware it is time.