Two straight weeks of falling gas prices sound like relief. Check your route sheet before you celebrate — the savings rarely make it past idle time and stop density.
EIA weekly data put regular gasoline at $4.141 a gallon for the week of Aug. 10, down from $4.211 the prior week and off the July 27 peak of $4.228. For a fleet of Ram ProMaster 2500s and Ford Transit 350s — the two vans that dominate DSP rosters — that seven-cent weekly drop looks like real money. It isn't, not on a per-stop basis.
Here's why: those vans average 18-19 mpg loaded, and last-mile routes rarely run at highway efficiency. Stop-and-go delivery patterns, extended idle time at apartment complexes, and detours around construction eat into whatever the pump price gives back. A driver running 150 stops a day burns fuel in bursts, not steady cruising — the number that determines your real cost isn't price per gallon, it's gallons consumed per stop, and that barely bends with weekly price swings.
The bigger signal is the trend line, not the week-over-week wiggle. Gasoline has moved in a roughly 30-cent band since early July — $3.911 to $4.228, per EIA data — which tells operators the real planning number isn't "prices are falling," it's "prices are volatile in a tight range." A DSP running 20 vans at 150 miles a day each burns through roughly 1,500-1,600 gallons a week at current consumption rates; a 30-cent swing in either direction moves weekly fuel spend by $450-480 without a single route change.
Operators who build fuel line items around single-week snapshots get surprised in both directions. Build around the band, not the dip.
See how this affects your cost per stop — free calculator at pexara.ai/calculator