LPG Vehicle Conversions : Quality and safety is our number one priority. For valuable resources pertaining to conversion to natural gas vehicles, please refer to:

Propane is an odorless, nonpoisonous gas that has the lowest flammability range of all alternative fuels. High concentrations of propane can displace oxygen in the air causing the potential for asphyxiation. This problem is mitigated by the presence of ethyl mercaptan, which is an odorant that is added to warn of the presence of gas. While LPG itself does not irritate the skin, the liquefied gas becomes very cold upon escaping from a high-pressure tank, and may therefore cause frostbite, should it contact unprotected skin. As with gasoline, LPG can form explosive mixtures with air. Since the gas is slightly heavier than air, it may form a continuous stream that stretches a considerable distance from a leak or open container, which may lead to a flashback explosion upon contacting a source of ignition.

LPG Vehicle Conversions (Liquid Petroleum Gas)

With the price of fuel, propane car conversions (also called LPG conversions) are attracting more attention—and it’s certainly one viable alt fuel option since propane has been used as a commercial motor fuel for more than 80 years and millions of miles. However, due to increased regulations, there are very few propane conversion kits for U.S. street passenger vehicles available today. It has actually been a much more popular choice in Europe and other countries due to less stringent regulations and higher petrol prices. Even though propane powered engines offer cleaner emissions along with 10 to 15 percent less carbon dioxide, 20 percent less carbon monoxide and 50 to 60 percent less hydrocarbons and nitric oxide, tighter emissions regulations have changed the way conversion companies can do business.

Clean Air Act

(a) Conversion of Existing and New Conventional Vehicles to Clean-Fuel Vehicles.- The requirements of section 246 may be met through the conversion of existing or new gasoline or diesel-powered vehicles to clean-fuel vehicles which comply with the applicable requirements of that section. For purposes of such provisions the conversion of a vehicle to clean fuel vehicle shall be treated as the purchase of a clean fuel vehicle. Nothing in this part shall be construed to provide that any covered fleetoperator subject to fleet vehicle purchase requirements undersection 246 shall be required to convert existing or new gasoline or diesel-powered vehicles to clean-fuel vehicles or to purchase converted vehicles.

(b) Regulations.- The Administrator shall, within 24 months after the enactment of the Clean Air Act Amendments of 1990, consistent with the requirements of this title applicable to new vehicles, promulgate regulations governing conversions of conventional vehicles to clean-fuel vehicles. Such regulations shall establish criteria for such conversions which will ensure that a converted vehicle will comply with the standards applicable under this part to clean-fuel vehicles. Such regulations shall provide for the application to such conversions of the same provisions of this title (including provisions relating to administration enforcement) as are applicable tostandards under section 242, 243, 244, and 245, except that in the case of conversions the Administrator may modify the applicable regulations implementing such provisions as the Administrator deems necessary to implement this part.

(c) Enforcement.- Any person who converts conventional vehicles to clean fuel vehicles pursuant to subsection (b), shall be considered a manufacturer for purposes of sections 206 and 207 and related enforcement provisions. Nothing in the preceding
sentence shall require a person who performs such conversions to warrant any part or operation of a vehicle other than as required under this part. Nothing in this paragraph shall limit the applicability of any other warranty to unrelated parts or operations.

(d) Tampering.- The conversion from a vehicle capable of operating on gasoline or diesel fuel only to a clean-fuel vehicle shall not be considered a violation of section 203(a)(3) if such conversion complies with the regulations promulgated under subsection (b).

(e) Safety.- The Secretary of Transportation shall, if necessary, promulgate rules under applicable motor vehicle laws regarding the safety of vehicles converted from existing and new vehicles to clean-fuel vehicles.
[42 U.S.C. 7587]

LPG Vehicle Conversions for Cars, Trucks, etc.