How much gas do I need to return a U-Haul?

It depends on your truck size, the fuel level at pickup, your current level, and how far you still need to drive. Use FillRight to get the exact gallon count for your specific U-Haul truck — it accounts for tank capacity, fuel efficiency, and a small safety buffer so you return at or above the level on your contract.

What happens if I return a U-Haul without enough fuel?

U-Haul charges a $30 fuel service fee plus above-market per-gallon rates to top up the difference. You end up paying significantly more than you would at a regular gas station. FillRight helps you avoid this by showing you exactly how many gallons to add before returning.

Does U-Haul use regular gas or diesel?

All U-Haul trucks use regular unleaded gasoline — never diesel. Penske trucks use diesel fuel. Budget and Enterprise trucks use regular unleaded. FillRight displays the correct fuel type for every supported truck so you fill up at the right pump.

How accurate is the fuel gauge on a moving truck?

Moving truck fuel gauges can lag or read slightly low, especially after refueling. FillRight adds a small safety buffer to your calculation to account for this, so you're protected even if the gauge isn't perfectly accurate when you return.

Can I use FillRight for Penske, Budget, and Enterprise trucks?

Yes. FillRight supports all four major rental companies: U-Haul, Penske, Budget, and Enterprise. Each company's trucks have accurate tank capacity and fuel efficiency data built in, so your calculation is specific to your exact truck model.

How do I avoid the U-Haul fuel surcharge?

Return the truck at or above the fuel level shown on your rental contract. FillRight calculates the exact number of gallons you need to add — accounting for your current fuel level and any remaining miles to the drop-off location — so you can fill up at a regular gas station and avoid the surcharge entirely.

What is U-Haul's fuel policy?

U-Haul requires you to return the truck at the same fuel level documented on your rental agreement at the time of pickup. If you return it below that level, U-Haul charges a service fee plus per-gallon refueling costs at their rates, which are typically higher than local gas station prices.

FillRight

Moving Truck Fuel Return Calculator

Avoid the $30 fuel surcharge — get the exact gallons for U‑Haul, Penske, Budget & Enterprise.

Planning a long-distance move? Plan all your fuel stops →

Step 1 — Your Truck

View specs

Rental Company

Truck Size

Step 2 — Fuel Levels

At Pickup

Right Now

“At Pickup” is the level shown on your rental contract.

Step 3 — Final Drive

Miles to Drop-off

From this pump to the U-Haul location

How loaded is your truck?

No cargo — using official MPG

Risk Tolerance

Fill up when tank hits 3/8 — comfortable buffer above fee threshold

Gas Price (optional)

$/gal

Enter $0.01 or more to see a cost estimate

👆 Select your truck size above to see the calculation.

Each truck has a different tank capacity and fuel efficiency — FillRight uses these to calculate exactly how much to add.

Estimates only — verify with your rental contract. Not affiliated with any rental company.

How FillRight Works

Select your truck
Choose your rental company and truck size. FillRight knows the exact tank capacity for every U-Haul, Penske, Budget, and Enterprise model.
Set your fuel levels
Enter the gauge level shown on your rental contract at pickup, then set your current level. FillRight calculates the gap.
Get your answer
See the exact gallons to add, adjusted for any miles still left to drive. Add your gas price for a cost estimate.

Why the fuel level matters

U-Haul, Penske, Budget, and Enterprise all charge a $30+ fuel service fee if you return a truck below the level shown on your contract — plus above-market per-gallon rates to top up the difference. FillRight gives you the exact number so you fill up at a regular gas station, not theirs.

Frequently Asked Questions

How much gas do I need to return a U-Haul?: It depends on your truck size, the fuel level at pickup, your current level, and how far you still need to drive. Use FillRight above to get the exact gallon count — it accounts for tank capacity, fuel efficiency, and a small safety buffer.
What happens if I return a U-Haul without enough fuel?: U-Haul charges a $30 fuel service fee plus above-market per-gallon rates to top up the difference. You end up paying significantly more than you would at a regular gas station.
Does U-Haul use regular gas or diesel?: All U-Haul trucks use regular unleaded gasoline — never diesel. Penske 22 ft and 26 ft trucks use diesel; their smaller trucks use regular. Budget's 26 ft truck uses diesel; the 12 ft and 16 ft use regular. Enterprise's 16 ft Cabover, 24 ft, and 26 ft trucks use diesel; the 15 ft Parcel Van uses regular. FillRight shows the correct fuel type for your truck.
How accurate is the fuel gauge on a moving truck?: Moving truck gauges can lag or read slightly low after refueling. FillRight adds a small safety buffer to your calculation so you're protected even if the gauge isn't perfectly accurate at return.
Can I use FillRight for Penske, Budget, and Enterprise trucks?: Yes. FillRight supports all four major rental companies. Each truck model has accurate tank capacity and fuel efficiency data built in, so your result is specific to your exact truck.
What is U-Haul's fuel policy?: U-Haul requires you to return the truck at the same fuel level documented on your rental agreement at pickup. Returning below that level triggers a service fee plus per-gallon charges at their rates — typically higher than local pump prices.