Mobile fuel delivery vs fuel cards: which is right for your fleet?

If you manage a commercial fleet, at some point you've compared mobile fuel delivery to a fuel card program — and then gotten confused by vendors pitching one as the "obvious" choice. Both solve real problems, but they're not interchangeable. Here's a head-to-head breakdown for Southeast Florida fleets, with the specific volume thresholds and use cases where each one wins.

Quick answer — which one is right for your fleet?

Before the details, a practical rule of thumb based on fleet size and route pattern:

• Fleets of 5–50 vehicles running local or regional routes out of a central yard: Mobile fuel delivery almost always wins on cost and driver time. Most fleets in this profile save $0.30–$0.50 per gallon plus 30–60 minutes of driver time per truck per week.
• Fleets under 5 vehicles, or long-haul operations outside a service area: Fuel cards usually win. The flexibility to fuel anywhere on a highway network outweighs per-gallon pricing differences at low volume.
• Mixed fleets with some local trucks and some roaming: A hybrid program — mobile delivery for the base fleet plus fuel cards for travel and exceptions — is usually the right answer. That's how most commercial fleets above 20 vehicles end up operating in practice.

Now the details on where those break-even points come from.

How each option actually works

Mobile fuel delivery

A DOT-certified fuel truck comes to your yard, construction site, or fleet depot on a schedule you set, and refuels each vehicle (or tops off an on-site storage tank) using metered wholesale fuel. Drivers start every shift with a full tank. No fuel stations, no cards, no per-transaction markup. Pricing is tied to daily OPIS rack rates at Florida terminals plus a transparent per-gallon margin. Invoicing is monthly, with one line per delivery.

Fuel cards

Each driver carries a branded fuel card — WEX, Comdata, Voyager, Fuelman, or a private-label card from a supplier — that is swiped at participating retail gas stations. The card restricts spending by fuel type, time of day, and dollar or gallon limit, and produces exception reports for unusual activity. Pricing at the pump is retail, sometimes with a small rebate ($0.02–$0.05 per gallon) from the card provider. Invoicing is aggregated by the card program but based on individual transactions.

Cost per gallon — where the real spread is

This is the dimension where mobile fuel delivery wins at any meaningful volume. The spread comes from where each model buys fuel:

• Mobile delivery: Fuel is bought from terminals at wholesale (OPIS rack) rates. Per-gallon margin is transparent and shrinks as volume grows. Typical delivered cost for a Southeast Florida fleet on 5,000+ gallons per month is the rack rate plus $0.08–$0.15 per gallon, depending on distance and account volume.
• Fuel cards: Fuel is bought at retail pump prices. The pump already includes retail markup ($0.30–$0.50 per gallon over rack in most Florida markets), credit card interchange, and station operating costs. Card rebates ($0.02–$0.05 per gallon) are a small offset against that.

Net result: At 5,000 gallons per month, mobile fuel delivery in Southeast Florida typically runs $0.30–$0.45 per gallon cheaper than a card-at-retail program, after accounting for any card rebate. On 15,000 gallons per month, the spread can exceed $0.50 per gallon.

To put numbers on it: a 20-truck fleet averaging 1,500 miles per week at 6 MPG burns roughly 20,000 gallons per month. A $0.40 per gallon spread is $8,000 per month — $96,000 per year in direct fuel cost.

If you want to run your own numbers, our fuel cost calculator lets you plug in vehicle count, miles, and MPG for an instant estimate.

Driver time — the hidden cost nobody prices

Fuel cards mean drivers fuel at retail stations, usually on paid time. A vehicle going to a gas station, waiting in line, pumping, and returning to route takes about 15–20 minutes per event, not counting off-route detour time. Two fill-ups per week per vehicle on a fleet of 20 trucks is roughly 14 hours of driver time weekly — about 60 hours per month at $25/hour loaded labor cost, or $1,500 per month in recovered productivity. That's a cost that never shows up on a fuel invoice but it's real.

Mobile fuel delivery eliminates this entirely. Trucks are refueled overnight, on a weekend, or at shift change — during paid idle time, not driving time. Drivers start each shift with a full tank and go straight to the first job.

Control, visibility, and fraud

Fuel cards

Card programs have built sophisticated controls: per-card dollar and gallon limits, time-of-day restrictions, station-type restrictions (fuel only, no convenience-store purchases), and exception reporting. For a mid-size fleet, card program software can flag a driver who fills up outside their route, buys premium when unleaded is authorized, or has a card used at a suspicious time. Modern programs are genuinely good at catching abuse patterns.

The underlying risk — drivers having authorized payment at thousands of gas stations — is still there. Card fraud, cloned cards, and fill-siphoning into personal vehicles are persistent problems that card companies and fleet managers actively fight but cannot eliminate. Industry data suggests 2–6% of total card-program fuel spend is lost to fraud and pilferage, depending on fleet discipline.

Mobile fuel delivery

The fraud attack surface is structurally smaller. Fuel moves from a certified tanker directly into your on-site tank or vehicle at metered volumes, with each transfer witnessed by a DOT-certified driver and a facility employee. There's no card to steal, no pump to manipulate, and no transaction-level exception pattern because every transfer is an accounted line item on a scheduled delivery. The risk shifts to on-site tank management (theft from your own tank), which is a smaller and more controllable problem.

What mobile fuel delivery gives up in card-style exception reporting, it recovers in tank-level monitoring. Remote sensors on an on-site bulk tank track consumption against vehicle mileage, flagging abnormal draw rates that indicate leaks, theft, or operational problems — often before a fleet manager would notice independently.

Flexibility — where fuel cards have a real advantage

Fuel cards are unmatched when a vehicle leaves the service area. If a truck needs to run from Miami to Jacksonville, it's going to fuel on the road — and any mobile delivery program hits a wall outside its geographic coverage.

For fleets that operate regionally or long-haul, fuel cards provide access to tens of thousands of stations across the country, often with manufacturer rebates on specific brand networks. For occasional travel, they're the pragmatic tool. Running a card-only program because 2% of your miles are long-haul, though, is letting the tail wag the dog.

Beyond out-of-area, fuel cards also cover ad-hoc refueling during emergencies when a truck can't return to base — rare but occasionally necessary.

When fuel cards are the right primary choice

Fuel cards (not mobile delivery) are usually the better primary tool when:

• Fleet is very small — fewer than 5 vehicles and volume below 1,000 gallons per month. Mobile delivery minimums and setup costs don't pay back.
• Fleet is highly distributed — vehicles are assigned to technicians or sales reps who work from home and rarely return to a central yard.
• Primary use is long-haul — most fueling happens at truck stops across multiple states.
• Vehicles rarely fuel in the same geographic area twice — construction subcontractors moving between counties or states weekly.

For these profiles, a well-managed card program with tight driver controls is the right tool. Exigo Fuels also offers commercial fuel card programs for fleets that fit this pattern, so the decision doesn't have to be "us vs. them."

Why most large fleets run both

The real-world answer for fleets of 20+ vehicles is usually a hybrid program: mobile fuel delivery for the base fleet (80–95% of monthly gallons) plus fuel cards for exceptions (the remaining 5–20%). This puts wholesale pricing on the bulk of your volume, eliminates driver time on routine fueling, and retains card flexibility for road trips, emergencies, and exception cases.

Professional fleet managers run it this way because it optimizes the whole. Card volume drops to a low enough percentage that any fraud risk is bounded. Mobile delivery handles the predictable, high-volume pattern. Neither tool has to cover 100% of use cases.

How to decide for your fleet — a simple checklist

Answer these five questions honestly about your current fleet:

1. How many gallons per month, total? Under 1,000: stick with fuel cards. Over 5,000: strongly consider mobile delivery. Between: case-by-case depending on route pattern.
2. Do your vehicles return to a central yard most nights? If yes, mobile delivery is viable. If no, fuel cards.
3. What percentage of miles is within Miami-Dade, Broward, and Palm Beach counties? Over 80%: mobile delivery covers your core. Under 50%: fuel cards cover your reality.
4. Are drivers losing 15+ minutes per shift to fueling? If yes, that's labor cost that mobile delivery recovers directly.
5. Do you have visibility into your current fuel-card fraud rate? If no, assume 3–5% and include it in your comparison.

If the answers tilt toward mobile delivery, the next step is an actual quote with numbers on your volume, routes, and yard locations. Call Exigo Fuels at (305) 900-6725 or request an on-site delivery quote — we'll run the comparison against your current card program and tell you the honest break-even point. If fuel cards are still the right fit, we'll tell you that too, and set up the card program instead.

Either way, the worst outcome is continuing with whichever program you set up years ago without checking whether it's still the right one.