The detour is the expensive part
A driver diverting to fuel spends paid time getting there, paid time waiting, and paid time filling in a card record. None of it moves a load. Across a fleet and a working week, it is a substantial number that rarely appears as a line in anyone’s fuel cost.
On-site fueling removes it. The fuel comes to the vehicles where they park, typically overnight, and trucks start their shift full. The saving is measured in hours recovered, not cents per gallon.
You find out what you actually use
Fuel-card data tells you what was bought. On-site delivery with tank monitoring tells you what was used, where, and when — per vehicle, per site, per shift.
That difference is where the surprises live. It is how operations discover the vehicle burning well above its peers, the site being topped up more often than its work justifies, or the shift pattern quietly costing more fuel than the one beside it.
Fewer people at the pump is a safety result
Fuel handling carries risk, and retail forecourts add traffic to it. Moving refueling into a controlled yard with trained operators reduces driver exposure and puts every transfer under a documented DOT and EPA compliant procedure.
It also produces the paperwork automatically, which matters the first time anybody asks for it.
It scales down as well as up
On-site fueling is often assumed to be for large fleets only. In practice the arithmetic works from a fairly small number of vehicles, because it turns on driver hours rather than volume.
Logistics fleets, construction sites, data centers and hospitals all run the same arrangement at very different scales. Summa’s trucks run 24/7/365, so deliveries can sit overnight or in whatever window leaves operations undisturbed.
Efficiency and emissions point the same way
Eliminating fuel detours removes miles that produced nothing. Consolidating deliveries into planned routes removes more. Using ultra-low sulfur diesel and correctly dosed DEF reduces what the remaining miles emit.
These are not separate programs. The same change that recovers driver hours also reduces the fleet’s fuel burn and its reported emissions, which is unusual enough to be worth stating plainly.
Worth a conversation
Give us your vehicle count, your locations and roughly what you burn. That is enough for us to say whether on-site fueling would pay for itself in your operation, including if the answer is no.