How to troubleshoot abnormal fuel consumption in a small fleet

For abnormal fuel consumption in a small fleet, you shouldn't just rely on the drivers' accounts or just look at fuel receipts. I once took over a fleet of a dozen vehicles where the owner suspected fuel theft, but after investigating, I found that half of it was due to route detours and the other half was due to excessive idling. Start by putting the GPS tracks, refueling times, odometer…