After-hours fuel delivery is a capability, not a wish
A night fill happens when the distributor lists after-hours work and you give them the hour. A daytime phone number and a hopeful note are not the same thing.
Who actually runs at night
Look at the profile for after-hours delivery and for the hours line. A company can cover your ZIP, sell ULSD, and still shut the yard at 5. The heavy-haul filter gives ranking weight to after-hours and wet hose because those searches are the ones that die without a night truck.
Weekend plant runs and dawn paving starts are the same problem. Write the clock time and the day in the needed-by field and the notes. “ASAP” is not a window a dispatcher can staff.
The site still has to let them in
A night truck that cannot pass the guard shack is a failed delivery. Name the gate, the person on the radio, and whether a tanker is allowed after dark. Ports, mills, and city jobsites are stricter than a rural yard.
If the listing does not mark after-hours, ask in the notes anyway only if you can accept a no. Do not plan the load on a maybe.
Questions
Does after-hours cost more?
Often, yes. Bulk Fueling does not publish that fee. The distributor quotes it.
Will every heavy-haul listing come at 2 a.m.?
No. Heavy haul and after-hours are separate checkboxes. Read both.