Index
Can any car be converted to LPG?
LPG conversion is possible for most gasoline-powered vehicles and, in some cases, diesel vehicles, though the process is more complex and less common for the latter. Compatibility depends on several factors, including engine type, vehicle age, and fuel injection system.
Gasoline engine conversion
Converting a gasoline car to LPG is a relatively straightforward process, particularly for engines with indirect fuel injection. For direct-injection engines, conversion is possible but requires a more sophisticated and expensive conversion kit.
The kit includes an LPG tank, typically installed in the spare tire well; a dedicated LPG injection system; and an electronic control unit that manages switching between gasoline and LPG. The conversion must be performed by a certified, authorized workshop.
Diesel engine conversion
Converting a diesel car to LPG is more complex and less common. There is technology that allows for blending LPG with diesel, but not all diesel engines are compatible.
This still-developing technology works by injecting a small amount of LPG into the combustion chamber alongside diesel, which improves combustion and reduces harmful emissions. Consult with a specialized workshop to assess the feasibility of converting your diesel vehicle.
To find out what your annual fuel savings would be by converting your vehicle to autogas, check out Moeve’s Autogas Calculator.
Step-by-step conversion process
If you decide to convert your car to LPG, here are the steps to follow:
- Research and consultation: Before making any decisions, contact professionals who specialize in LPG vehicle conversions. They will advise you on the feasibility of converting your specific vehicle, the most suitable conversion kit type, and the total installation cost.
- Choosing the conversion kit: Various LPG conversion kits are available on the market, each with different features and price points. The right kit depends on your car's engine type, power output, and injection system. Qualified professionals will help you select the most appropriate kit for your vehicle.
- Installation by a certified professional: The conversion kit must be installed by a specialized, authorized workshop. This ensures safety, system efficiency, and compliance with current regulations. A certified installer will provide a warranty on the installation and advise you on system maintenance.
- Testing and adjustments: Once the kit is installed, the workshop will conduct a series of tests to verify proper system operation and adjust the configuration for optimal performance. These tests include checking the injection system, verifying the LPG tank’s seal integrity, and testing the switch between gasoline and LPG.
- Certification: After installation and testing, the workshop will handle vehicle homologation, certifying that it meets current regulations for LPG-converted vehicles. This process involves submitting the necessary documentation to the relevant authorities.
- Documentation update: Once you have the homologation certificate, you must update your vehicle's documentation, including the registration certificate, to reflect the LPG conversion. This procedure is carried out at the Provincial Traffic Headquarters.
- Maintenance: The LPG system requires periodic maintenance, including inspection of the injection system, tank seal integrity checks, and filter replacements. Proper maintenance ensures reliable system operation and extends its service life.
How much does it cost to convert a car to LPG?
Conversion costs vary depending on vehicle type, conversion kit, and workshop. Generally, converting a gasoline car to LPG typically costs between €1,500 and €3,000. Diesel conversions, being more complex, can cost significantly more, ranging from €3,000 to €5,000.
Pros and cons of LPG conversion
Like any major decision, converting your car to LPG has its advantages and drawbacks. Weighing these will help you make the best choice.
Key benefits
The advantages of converting your car to LPG include:
- Fuel economy: LPG is typically 40% to 50% cheaper than gasoline and diesel, allowing you to save significantly with every fill-up. Additionally, its noise impact is 50% lower.
- Reduced environmental and noise impact: LPG is a cleaner fuel than gasoline and diesel, reducing CO2, NOx, and particulate emissions.
- Extended range: By being able to use both LPG and gasoline, your vehicle's range increases considerably.
- ECO sticker: LPG conversion qualifies your vehicle for the DGT’s ECO sticker, granting access to restricted traffic zones and tax benefits.
Drawbacks to consider
On the other hand, keep the following disadvantages in mind:
- Initial investment: LPG conversion requires an initial investment that pays for itself through long-term fuel savings. The payback period depends on vehicle usage and fuel prices but typically ranges from one to two years.
- Loss of space in the trunk: The LPG tank takes up space in the trunk, usually where the spare tire is stored. Different tank types are available, such as toroidal tanks that fit in the spare tire well or cylindrical tanks installed in the trunk.
- Power reduction: In some cases, LPG conversion may slightly reduce engine power by 2% to 5%. However, this reduction is usually not noticeable in everyday driving.
- LPG system maintenance: The LPG system requires periodic maintenance, including inspection of the injection system, tank seal integrity checks, and filter replacements. This maintenance is generally affordable and is performed every 20,000 to 30,000 km.
Learn more
For more information about the ECO Sticker and the benefits it provides, visit the official DGT website: https://www.dgt.es/nuestros-servicios/tu-vehiculo/tus-vehiculos/distintivo-ambiental/etiqueta-eco/
