[MyGoodness]

I have read previous threads and have not come up with a solid answer to this question:

With no leaks in the system, how many 1/2 barrel kegs of Guinness will be dispensed with a 5lb tank of beer gas (75% Nitro/25% Co2) at 30-35 PSIG?

I have three kegs of Guinness ordered for St. Patrick's day and I want to make sure that I have enough gas to dispense them all properly.

Before anyone ask, I have all the proper equipment and have been running Guinness through my system perfectly for over a year. The problem is I have never run multiple kegs back-to-back-to-back in one day before.

Thanks for the help, and happy drinking.