· Updated · 7 min read · StreetLegal Team
Food Truck Propane and Fuel Costs (2026): Monthly Budget Breakdown
Updated August 13, 2026
Fuel is one of those food truck costs that's easy to underestimate because it's split across three different things — propane for cooking, fuel for the generator, and gas or diesel to actually drive the truck to each location. Add them up separately and the real monthly number is usually bigger than operators expect. Here's current 2026 pricing for each, plus how to build a monthly budget from them.
Cooking propane costs
Propane has been averaging close to $3/gallon nationally in 2026, with real regional variation — some states have seen prices as high as $5/gallon. This is the propane that feeds fryers, grills, and flat-tops directly, separate from any propane used to run a dual-fuel generator. Usage depends heavily on menu (a fry-heavy menu burns through more propane than a grill-only truck) and service volume, so track your own tank refill frequency for a few weeks before trusting a generic per-month estimate.
Generator fuel costs
Generator fuel is its own line item, and it's a bigger one than most new operators expect: as a rule of thumb, roughly half of a truck's total fuel spend goes toward powering the generator rather than moving the truck itself. Diesel is typically three to four times more expensive per unit of energy produced than gasoline or propane, which is part of why most trucks run gas or dual-fuel gas/propane generators rather than diesel units. For the full breakdown of generator purchase price, sizing, and maintenance, see our food truck generator costs guide.
Driving fuel: gas and diesel
The AAA national average for regular gasoline was $3.98/gallon as of mid-July 2026, up from $3.86/gallon just a week earlier — fuel prices move fast enough that it's worth checking current local pricing rather than budgeting off an old number. Diesel has been running close to $6/gallon over the same stretch. What actually determines your monthly driving cost is the truck's MPG, and that varies enormously by build: step vans like a Freightliner MT45 commonly get 8-12 MPG, Mercedes-Benz Sprinter-based trucks 15-20 MPG, Ford Transit-based trucks 14-19 MPG, and larger custom box-truck builds can drop as low as 4-5 MPG.
| Truck type | Typical MPG |
|---|---|
| Sprinter-based (Mercedes-Benz) | 15-20 MPG |
| Ford Transit-based | 14-19 MPG |
| Step van (e.g. Freightliner MT45) | 8-12 MPG |
| Larger custom box-truck builds | 4-5 MPG |
Building your monthly budget
The formula for driving fuel is straightforward: round-trip miles per service day × service days per week ÷ truck MPG × current price per gallon, then multiply the weekly total by about 4.3 for a monthly figure. A truck driving 80 miles a day, 5 days a week, getting 20 MPG at the current $3.98/gallon average comes out to roughly $160/month on driving fuel alone. A heavier step van at 10 MPG on the same route and price roughly doubles that, to around $320/month. Add generator fuel (often close to that same driving-fuel number, per the roughly-half rule of thumb above) and cooking propane on top, and a realistic combined monthly fuel budget for a single truck commonly lands somewhere in the $300-$700 range, depending heavily on truck MPG, generator size, and menu. Track actual receipts for a full month before locking in a number — fuel is one of the few food truck costs cheap enough to measure directly rather than estimate.
Frequently asked questions
What does a food truck spend on fuel in a typical month?
Driving fuel alone often runs $150-$350/month depending on MPG and route; combined with generator fuel and cooking propane, many single-truck operators land in the $300-$700/month range.
How much does propane cost for a food truck in 2026?
Close to $3/gallon nationally, with regional prices as high as $5/gallon in some states.
How much does gas or diesel cost to drive a food truck to locations?
Gasoline averaged $3.98/gallon nationally (AAA, mid-July 2026); diesel has been running close to $6/gallon.
How do I estimate my truck's monthly driving fuel cost?
Round-trip miles per day × service days per week ÷ MPG × price per gallon, then × ~4.3 for a monthly estimate.
Does generator fuel or driving fuel usually cost more?
They're often close — roughly half of total truck fuel spend typically goes to the generator rather than driving.
Fuel is easier to budget when everything else is already tracked.
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