Do Natural Gas or Propane Trucks Need a New Mexico Fuel Permit?

Do Natural Gas or Propane Trucks Need a New Mexico Fuel Permit?

Table Of Contents

• Introduction

• The Short Answer

• What New Mexico Means by Special Fuel

• Who Needs a New Mexico Fuel Permit

• Why Natural Gas and Propane Trucks Fall Outside the Rule

• Dual-Fuel Trucks Are Different

• What These Trucks Still Need in New Mexico

• Other States on the Route

• Common Mistakes to Avoid

• Why Many Trucking Companies Choose Our Service

• FAQ

Introduction

More fleets are running trucks on compressed natural gas (CNG), liquefied natural gas (LNG), and propane. Refuse haulers, regional delivery fleets, and some long-haul carriers use them to cut fuel costs and emissions.

When one of these trucks heads into New Mexico, a common question comes up: does it need a New Mexico Fuel Permit like a diesel truck? New Mexico law gives a clear answer, and it depends entirely on the fuel the engine burns. This guide explains the rule, the exceptions, and what these trucks still need at the port of entry.

The Short Answer

Generally, no. New Mexico's temporary fuel permit rules apply to special fuel users, and New Mexico law excludes liquefied petroleum gas (propane), compressed natural gas, and liquefied natural gas from the definition of special fuel.

The New Mexico Motor Vehicle Division (MVD) also states that "diesel is the only type of fuel considered as a special fuel to be reported on IFTA returns" in New Mexico.

So a truck that runs only on natural gas or propane is generally not covered by the New Mexico Fuel Permit requirement. The exception is a dual-fuel truck that also burns diesel, which is covered below.

What New Mexico Means by Special Fuel

New Mexico's fuel permit rules are part of the Special Fuels Supplier Tax Act, NMSA 7-16A. Section 7-16A-2 defines special fuel as:

• Diesel-engine fuel

• Biodiesel and blended biodiesel

• Kerosene

when used to power a motor vehicle. The same definition specifically excludes:

• Gasoline

• Liquefied petroleum gas (propane)

• Compressed or liquefied natural gas

• Aviation fuels for turbo-prop or jet engines

Because propane, CNG, and LNG are named as exclusions, they are not special fuel under New Mexico law.

Who Needs a New Mexico Fuel Permit

Under NMSA 7-16A-2, a special fuel user is a registrant, owner, or operator of a motor vehicle using special fuel with a gross vehicle weight of more than 26,000 pounds.

Section 7-16A-19 says a special fuel user whose vehicle is not registered with the department must get, before operating on New Mexico highways:

• A temporary special fuel user permit, valid for one calendar day or for one entry into and one exit out of New Mexico, or

• A border crossing special fuel user permit for certain Mexico-registered vehicles near the border.

Prepaid trip tax permits are also addressed in the New Mexico Administrative Code at 3.12.101 NMAC. Acting as a temporary special fuel user without a valid permit is a violation of the act.

Why Natural Gas and Propane Trucks Fall Outside the Rule

Put the definitions together:

1. The permit requirement applies to special fuel users.

2. A special fuel user must be using special fuel.

3. Propane, CNG, and LNG are not special fuel.

That means a dedicated natural gas or propane truck does not become a special fuel user just because it weighs more than 26,000 pounds. A 40,000-pound CNG refuse truck and a 40,000-pound diesel refuse truck may look alike at the scale, but only the diesel truck falls under the special fuel rules.

Dual-Fuel Trucks Are Different

Some trucks use a dual-fuel setup, burning natural gas together with diesel, or carrying both systems. These trucks still burn diesel-engine fuel, which is special fuel.

If a dual-fuel truck is over 26,000 pounds and uses diesel in New Mexico, it fits the definition of a special fuel user. In that case, it needs IFTA credentials or a New Mexico Fuel Permit before entering the state.

Before dispatch, confirm exactly what each engine burns. A truck listed as "natural gas" in your records may still use diesel as a pilot fuel.

What These Trucks Still Need in New Mexico

Skipping the fuel permit does not mean skipping every requirement. A heavy natural gas or propane truck may still need:

• Weight Distance Tax (WDT). MVD says New Mexico imposes the weight distance tax on commercial vehicles with a declared gross vehicle weight over 26,000 pounds. That rule is based on weight, not fuel type.

• Registration or a trip permit. A truck without proper registration for New Mexico may need a trip permit.

• Port of entry stops. MVD says commercial vehicles must stop at every operating port of entry for manifesting and clearance.

• Federal requirements. USDOT number, UCR, and IRS Form 2290 rules depend on the operation and weight, not the fuel.

Natural gas and propane used in vehicles are taxed under separate New Mexico law, not through the special fuel permit.

Other States on the Route

New Mexico's rule is not universal. Other states may treat propane and natural gas as taxable motor fuel and expect them on IFTA returns or a fuel permit. A CNG truck that needs nothing for fuel in New Mexico may still have fuel duties in Arizona, Texas, or Colorado on the same trip.

Check each state on the route before the truck leaves.

Common Mistakes to Avoid

• Assuming every heavy truck needs a fuel permit. In New Mexico, the rule depends on the fuel, not just the weight.

• Missing dual-fuel trucks. If the engine burns diesel, special fuel rules apply.

• Assuming the truck needs nothing. Weight distance tax, registration, and port of entry rules can still apply.

• Treating the whole fleet the same. Check fuel type truck by truck.

• Ignoring other states. Propane and natural gas rules vary outside New Mexico.

Why Many Trucking Companies Choose Our Service

New Mexico Trucking Online helps carriers sort out which trucks need a New Mexico Fuel Permit and which need other credentials instead. We check fuel type, weight, and route so every truck has the right paperwork at the port of entry.

• 1-2 Trucks: $97

• 3-4 Trucks: $197

• 5-6 Trucks: $297

• 7-8 Trucks: $397

• 9-10 Trucks: $497

• 11+ Trucks: Contact Us directly!

We provide support 24/7 and also work weekends and holidays.

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FAQ

• Does a natural gas truck need a New Mexico Fuel Permit?

  Generally no. Compressed and liquefied natural gas are excluded from special fuel under NMSA 7-16A-2.

• Does a propane truck need a New Mexico Fuel Permit?

  Generally no. Liquefied petroleum gas is also excluded from special fuel.

• What about dual-fuel trucks?

  If the truck also burns diesel and weighs over 26,000 pounds, it is a special fuel user and needs IFTA or a permit.

• Do natural gas trucks still owe weight distance tax?

  They can. The weight distance tax applies to commercial vehicles over 26,000 pounds declared gross weight, regardless of fuel.

• Is the rule the same in other states?

  Not always. Other states may require fuel credentials for propane or natural gas.

For more information, visit the New Mexico Motor Vehicle Division.