Telecom Findings Fuel lost for false invoicing and theft can reach 30-40% out of fuel expense. 70-80% of the energy in a network is consumed by the cell sites. Appropriate generator maintenance and running load can save 50-60% of the run time cost of the site. ** Fleet Findings Under inflated tires can increase fuel consumption by up to 12%. 34% out of total engine run time is in Idle. Smart optimization of assets can save even 40% of operational costs.