What is methane used for: types of fuel, gas station features and safety rules

Methane as a vehicle fuel is gaining popularity due to its efficiency and environmental friendliness. However, many drivers are confused: what exactly is poured into the cylinder of a methane car, how does it differ from propane, and where can you refuel? In this article we will analyze all the nuances - from the chemical composition of the fuel to practical operating tips.

It is important to understand that methane and propane-butane These are two fundamentally different types of gas fuel. Methane (CH₄) is a natural gas that is stored in pressurized cylinders 200–250 atm, while the propane-butane mixture liquefies at a pressure of only 10–15 atm. This determines not only the design of gas cylinder equipment (LPG), but also the rules for refueling, storage, and the choice of gas stations.

If you are just planning to convert your car to methane or have already become the owner of a methane gas equipment, this article will help you avoid common mistakes. We will tell you which fuel is suitable for your car, how to distinguish a quality gas station from a dubious one, and what to do in case of a gas leak. Let's start with the main thing - let's figure out what exactly is poured into the methane cylinder.

1. What is methane as a vehicle fuel?

Methane (CH₄) is natural gas, which in compressed form is used as fuel for cars. Unlike propane, methane does not liquefy at room temperature, so it is stored in cylinders under high pressure - 200–250 bar. This imposes special requirements on the design of cylinders and filling equipment.

Main characteristics of methane as a fuel:

• 🔥 Octane number — 110–120 (higher than gasoline, which allows the compression ratio in the engine to be increased).
• 🌍 Environmental friendliness - when burned, releases 20–30% less CO₂ compared to gasoline.
• 💰 Cost - on average by 40–50% cheaper than AI-95 gasoline (for current prices, see the section on gas stations).
• ⚡ Energy intensity — inferior to gasoline: 1 m³ of methane ≈ 1.1 liters of gasoline by energy value.

Methane for cars comes in two forms:

1. Compressed natural gas (CNG) - purified methane, compressed to 200–250 atm. This is the most common option for cars and trucks.
2. Liquefied natural gas (LNG) - methane, cooled to −160°C to transform into a liquid state. It is used mainly on large vehicles (buses, trucks) and requires cryogenic cylinders.

In Russia and the CIS countries it is used exclusively for passenger cars. CNG. LNG stations are still rare and are aimed at commercial vehicles. Therefore, later in the article we will talk specifically about compressed methane.

2. What methane cars are fueled with: fuel composition

A methane car is refilled into a cylinder compressed natural gas (CNG), which is on 90–98% consists of methane (CH₄). The remaining components are impurities that are regulated by GOST. According to GOST 27577-2000, the composition of CNG must comply with the following standards:

Component	Allowable content, %	Note
Methane (CH₄)	≥ 90	The main component that determines the energy value
Ethane (C₂H₆)	≤ 6	Increases octane number, but reduces calorific value
Propane (C₃H₈) + butane (C₄H₁₀)	≤ 1,5	In large quantities, it impairs detonation resistance
Nitrogen (N₂) + carbon dioxide (CO₂)	≤ 3	Inert gases do not burn, but occupy the volume of the cylinder
Sulfur (H₂S, mercaptans)	≤ 0,02	Corrosive to equipment and toxic

Critical information: At some gas stations, up to 20% propane-butane mixture can be added to CNG to increase energy intensity. This violates GOST and leads to premature engine wear due to a decrease in octane number. Always check the fuel quality certificate at the gas station!

How to distinguish high-quality methane from diluted one?

• 📄 Require a quality certificate — at each gas station there must be a document with data on the last check of the gas composition.
• 🔍 Pay attention to the color of the flame - pure methane burns with a blue flame, and propane impurities give a yellowish tint.
• 🚗 Monitor the behavior of the car — if detonation or loss of power occurs after refueling, the fuel is diluted.

3. Where to fill up with methane: types of gas stations and their features

Methane refueling is different from traditional gasoline or propane gas stations. Here are the key features:

3.1. Types of methane gas stations

• 🏭 Stationary CNG filling stations (Automobile gas filling compressor stations) — full-fledged gas stations with compressor equipment that pump gas directly from main pipelines. The most reliable and common option.
• 🚛 Mobile CNG filling stations — mobile gas stations based on trucks with cylinders. Used in regions without developed gas infrastructure.
• 🏠 Home refills - compressor units for private use (for example, GasCompressor Mini). They allow refueling from a domestic gas pipeline, but require approval from gas services.

3.2. How to find a methane gas station?

In Russia and the CIS countries, a network of methane gas stations is developing, but is still inferior to gasoline ones. Here are the current search methods:

• 🗺️ Google/Yandex Maps — search for “CNG filling station”, “methane filling station” or “CNG”.
• 📱 Mobile applications:
  • GasNow — shows prices and location of CNG filling stations.
  • Russian gas station — filter by fuel type (choose “Methane”).
  • Waze — marks gas stations on the map.
• 🌐 Official sites:
  • Rostransgaz (rtgaz.ru) is the largest CNG filling station operator in Russia.
  • Gazprom gas engine fuel (gmt.gazprom.ru).

Average price for methane (CNG) in Russia at 2026:

Region	Price per 1 m³, ₽	Equivalent to 1 liter of AI-95 gasoline, ₽
Moscow and Moscow region	18–22	20–24
St. Petersburg	19–23	21–25
Yekaterinburg	16–20	18–22
Krasnodar region	15–19	17–21
Siberia (Novosibirsk, Omsk)	14–18	15–20

4. How to refuel a car with methane: step-by-step instructions

The methane filling process is different from a gasoline or propane gas station. Here are the detailed instructions:

1. Access to the pump:

   Turn off the engine and put the car on the handbrake. At most CNG filling stations, refueling occurs on the driver's side, but there are stations with double-sided dispensers.

2. Gun connection:

   Open the gas cylinder hatch (usually located in the trunk or under the bottom). Remove the protective cap from filling valve and connect the gun. It should click into place with a characteristic sound.

3. Payment:

   At most CNG filling stations, payment is made after refills according to actual volume. Go to the cash register, give the pump number and pay for the filled fuel. Some stations support prepayment by card.

4. Refueling:

   Click the "Start" button on the column. The pressure in the cylinder will automatically equalize with the pressure at the gas station (usually 200–220 atm). The process takes 3–5 minutes.

5. Completion:

   After stopping the column, disconnect the gun, close the valve with the protective cap and close the cylinder hatch.

Turn off the ignition and remove the key from the lock|Check the integrity of the filling hose|Make sure that the cylinder is not overheated (temperature no higher than +45°C)|Do not smoke or use open fire within a radius of 10 m|After refueling, check the tightness of the connections with a soap solution-->

⚠️ Attention: Never refuel with methane if:

• The cylinder is damaged or has dents.
• The filling valve is not sealed (hissing can be heard).
• The gas station does not have a fuel quality certificate.
• The pressure in the cylinder exceeds 250 atm (risk of rupture).

What to do if the gun does not connect?

If the gun does not lock onto the fill valve, check:

1. Compliance with the connector type (in Russia the standard is used NGV1).

2. No dirt or ice on the valve (wipe with a dry cloth).

3. Serviceability of the check valve (if a malfunction occurs, the valve must be replaced).

If the problem persists, do not use force - contact the gas station operator.

5. Safety during operation of methane gas equipment

Methane is the safest gas fuel due to its high ignition temperature (650°C against 470°C for gasoline). However, improper use may result in leaks or explosions. Basic precautions:

5.1. Parking and storage rules

• 🚗 Prohibited leave cars running on methane in closed, unventilated areas (underground parking lots, garages without ventilation).
• ☀️ Avoid overheating the cylinder - Do not park in direct sunlight in the summer. Optimal cylinder temperature: from −40°C up to +45°C.
• 🔧 Check leaks regularly - Apply a soap solution to the connections at least once a month (bubbles will indicate a leak).

5.2. Actions in case of gas leak

⚠️ Attention: If you smell gas in or around the car (an odorant is added to detect leaks), immediately:

1. Stop the engine and turn off the ignition.
2. Open all windows for ventilation.
3. Do not smoke or use electrical appliances (risk of sparks).
4. Shut down manual valve on cylinder (located under the protective cap).
5. Evacuate to a safe distance and call the emergency gas service (104 or 112).

5.3. HBO maintenance

Methane equipment requires regular maintenance:

Component	Check frequency	What is being checked
Cylinder	Every 2 years	Integrity, corrosion, pressure
Pipelines	Every 10,000 km	Tightness, no cracks
Gearbox	Every 30,000 km	Cleanliness of filters, operability of valves
Gas filter	Every 15,000 km	Replacement when dirty
Electronics (GBO ECU)	Every 50,000 km	Error diagnosis, software update

⚠️ Attention: After an accident or a strong blow to the cylinder area necessarily Carry out unscheduled diagnostics of HBO! Even invisible damage can lead to depressurization.

6. Methane vs propane-butane: which is better for cars?

The choice between methane and propane depends on the purpose of using the vehicle. Let's compare the key parameters:

Parameter	Methane (CNG)	Propane-butane (LPG)
Fuel cost	⭐⭐⭐⭐⭐ (cheapest)	⭐⭐⭐
Consumption per 100 km	10–12 m³ (≈11–13 l gasoline)	8–10 l (≈9–11 l gasoline)
Octane number	110–120	100–105
Travel range	200–400 km (depending on the volume of cylinders)	500–800 km
Security	⭐⭐⭐⭐⭐ (high ignition temperature)	⭐⭐⭐ (risk of leakage due to liquid phase)
HBO cost	80,000–150,000 ₽ (high pressure cylinders)	30 000–60 000 ₽
Gas station network	Limited (mainly in large cities)	Widespread

Methane is more beneficial for:

• 🚛 Commercial vehicles (taxi, trucks, buses) - savings on fuel cover the high cost of gas equipment.
• 🌿 Eco-friendly drivers — CO₂ emissions per 25% lower than gasoline.
• 🏙️ Urban operation — if there is a CNG filling station within the city.

Propane-butane is preferable if:

• 🚗 You often travel long distances (the network of propane gas stations is wider).
• 💰 The budget for installing HBO is limited.
• 🔧 Your engine is not adapted to the high octane number of methane.

7. Myths and misconceptions about methane

There are many myths surrounding methane fuel. Let's look at the most common ones:

7.1. "A methane cylinder can explode on impact"

❌ Myth. Modern CNG cylinders are made from composite materials or high-strength steel, can withstand pressure up to 600 atm and undergo crash tests. In the event of a strong impact, the gas is simply released through emergency valve, and does not explode.

7.2. "Methane ruins the engine"

❌ A myth when configured correctly. Methane has a higher octane number than gasoline, so if the ECU is correctly calibrated, the engine runs smoother. However diluted methane (with propane) actually leads to detonation and wear of the piston group.

7.3. "Refilling with methane takes too long"

❌ Myth. Modern CNG filling stations fill at a speed 30–50 l/min (in terms of gasoline). Full cylinder (80–100 l eq.) refills for 3–5 minutes - comparable to gasoline.

7.4. "Methane cars cannot be parked in underground parking lots"

✅ True, but with nuances. According to SP 4.13130.2013, CNG vehicles are prohibited from being left in closed parking lots without supply and exhaust ventilation. However, in most modern underground parking lots (for example, in shopping centers) such ventilation is provided - check with the administration.

7.5. "Methane gas equipment cannot be installed on any car"

❌ Myth. HBO 5th and 6th generations (for example, Lovato NG or BRC Sequent Plasma) are compatible with most injection and turbocharged engines. The exception is motors with direct injection (for example, Toyota D-4S) where special adaptation is required.

8. Frequently asked questions (FAQ)

❓ Is it possible to fill a propane tank with methane?

❌ No! Propane tanks are pressure rated 10–15 atm, and methane requires 200–250 atm. Filling a propane tank with methane will cause it to burst.

❓ How many methane cylinders can be installed on a passenger car?

Usually installed on passenger cars 1–2 cylinders volume by 50–80 l (gasoline equivalent). For example:

• 🚗 Sedan — 1 toroidal cylinder in the spare tire niche.
• 🚙 Station wagon/hatchback — 2 cylindrical cylinders in the trunk.

It is not advisable to install more than two cylinders due to the loss of useful volume.

❓ What to do if there is no methane at the gas station?

In this case you can:

1. Switch to gasoline (if the LPG supports automatic switching).
2. Use mobile CNG filling stations (if such a service is available in the region).
3. Refuel at the nearest stationary CNG filling station, even if you have to make a detour.

⚠️ Do not refuel at dubious gas stations with methane of unknown origin - this is fraught with engine failure.

❓ What is the resource of a methane cylinder?

Service life of CNG cylinders:

• 🔄 Metal cylinders — 15–20 years when undergoing examination every 2 years.
• 🔄 Composite cylinders — 20–30 years (not subject to corrosion, but require testing for leaks).

After the expiration date, the cylinder must be recycling — re-certification is not allowed.

❓ Is it possible to install gas equipment on methane yourself?

❌ No. Installation of methane gas equipment requires:

1. Certified equipment (cylinders must have a sign E22 or PCT).
2. Registration of changes in car design in traffic police.
3. Engine ECU settings for gas (diagnostic equipment required).

Self-installation will lead to refusal to register and risk of explosion!