An avenue open to contractors is pre-purchasing gas or diesel fuel in quantities which allow for proper budgeting of such costs. All contractors can project fuel usage by looking at past history. Historical data is normally available to the contractor who has even a rudimentary accounting package in place. Once determined, approaching the fuel supplier about committing to a set amount of gas or diesel for a finite period of time can bring some relief to the volatility all vehicle operators are facing. You will need to have in-house fuel storage in order to do this, but that expense is finite too. Once purchased, these systems can stay in place almost indefinitely.