Common Questions & Answers to LGC LPG/CNG Conversion Kits


Q1: Will your LPG/CNG kits work with my vehicle?

A1: LGC sells two types of gas conversion kits: sequential injection system and aspirated system (mixer system).
These Sequential injection conversion kits are designed for a 4th generation vehicle. 4th generation vehicles are called sequential fuel injected vehicles, or multi-point fuel injected vehicles. Most of today's vehicles manufactured from 1990 through 2010 have 4th generation systems. We do not have a database of vehicles which can tell us whether your vehicle is 4th generation or not. If you are unsure, please contact your vehicle's manufacturer.

Aspirated system fit nearly all type of gasoline cars EXCEPT cars of direct injection engines, but it is mainly for those older cars like which has a carburetor and its performance is not as good as sequential injection system. For newer cars, injection system is recommended.
Q2: Can I Still Run on Gasoline?
A2: Our conversion kits are bi-fuel systems. Your vehicle needs to start on gasoline and once the engine is warm enough, switching to LPG/CNG is possible. You can switch back to gasoline at any time and the vehicle will automatically switch back to gasoline if there is a problem with the LPG/CNG system.
P.S.: our systems have force start function, you can coldstart from autogas directly, however this is not recommended and it require your engine be warm enough when doing so.
Q3: What is the fuel economy (MPG) of Propane and CNG?
A3: The energy density of LPG (energy per unit of volume) is less than gasoline. CNG has very low energy density since it is still in gaseous form. When comparing prices on the two fuels, it is best to convert the LPG/CNG to a price per gasoline equivalent. LPG has a gasoline equivalent of 1.35 and 3.82 for CNG at 3600 psi. What this means is that for a gallon of gasoline burned, it takes a 1.35 gallons of LPG or 3.82 gallons of CNG to move the same distance. So if your fuel economy is 30 mpg, with LPG it will be 22.2 mpg and with CNG 7.85 mpg.
Q4: How much money can I save by using LPG/CNG?
A4: In order to compare savings of using each fuel instead of gasoline, you must find prices based on gasoline equivalents or weight. When using weight, simply take the density of gasoline which is 6 lb/gallon, convert to dollars per pound, and then compare to the dollars per pound on the LPG/CNG. Most consumers will find LPG to be about half the cost of gasoline and CNG about a quarter of the cost of gasoline.
Q5: Will I pass emissions testing with an LPG or CNG Kit?
A5: LPG and CNG both burn cleaner than gasoline. There should be no issues with emissions testing. However, if there is concern during the test, simply run on gasoline during the emissions testing.
Q6: Do you install LPG/CNG kits?
A6: No. We are only distributors of these kits.
Q7: Where do I find LPG or CNG for fueling my vehicle?
A7: LPG and CNG are beginning to become popular in the USA. Check to see if there are any fueling stations in your area. If there are none, check with your local gas companies. Local gas companies can also help with finding standard cylindrical tanks.
Q8: Where can I find a tank?
A8: We carry cylindrical LPG tanks and cylindrical CNG tanks but these are very heavy for you buy from us in China. You may also be able to find tanks from your local gas companies or tank manufacturers.
Q9: Are the kits EPA certified?
A9: No. These kits are intended for off-road use only.
Q10: Can the LPG/CNG kits work on a diesel?
A10: No. These kits will only work with gasoline engines. We are currently working on kits for diesel engines, but are far off from achieving perfect success.

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