We have Fill-Rite pumps on all of our tanks. Both have analog meters with a restetable meter and a non-restetable totalizer. We go through about 70,000 gallons per year of unleaded and these pumps last us about 5 years.
We also have Fuelshield from
http://www.sciufm.com. This tracks everything digitally based on who, what, when, where it went and how much. Even though it is computerized, we still track on paper as backup and for comparison purposes. With this program, it also prevents gas from going in a diesel and vice versa.
We also have cameras above our pumps,
My secretary compares both logs with each other everyday for discrepancies. We can catch theft usually in less than 24 hours.
Even with all of this, we still have those idiots that try to steal fuel.