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Tel: (01302) 722282 Fax: (01302) 337127
E-mail: info@centralgaragecarcroft.co.uk

Central Garage (Carcroft)
Proprietor: J.& A. Padgett


What is LPG?
LPG is the abbreviation for Liquefied Petroleum Gas.

Where is it from?
40% of LPG comes from the refining of crude oil and 60% straight from field production. At atmospheric pressure it is a vapour, under moderate pressure it becomes a liquid.

How is it Stored?
The liquid gas is stored in pressure vessels which are constructed to BS5500. The manufacturer issues a test certificate, together with a letter of fit for purpose, in accordance with pressure systems regulations.

Where is my nearest filling point?
For your nearest point go to our link at the bottom of the page.

Does LPG damage my engine?
No. LPG is a clean burn fuel which extends engine life.

What about my vehicle's performance?
LPG does not show any appreciable difference in performance to other fuels, however it does run quieter than diesel due to the absence of knocking effect.

How big is the tank?
A tank smaller than a spare wheel will give an average range of 300 miles. But remember you will still have the petrol tank.

What can I save?
Taking into account the cost of the conversion an average fleet van traveling 30,000 miles per year could save £2,376.

Can I still use petrol?
Yes, the dual fuel capability of the conversion will double your range. All kits offer the ability to change over the fuel type on the go.

What would happen if I drove away with the fill hose connected?
A breakaway coupling is fitted to the fill hose and when broken will shut off the gas flow.

What would happen if I overfilled my tank?
Filling stops automatically at 80% capacity to ensure that there is room for heat expansion. Any over pressure that might occur would automatically vent to the atmosphere.

What would happen if someone left the vehicle unattended when filling?
The hose is fitted with a dead man's handle which must be held to operate.

What would happen if my car caught fire?
If the fire was left then the petrol tank would explode. However, due to the safety features of LPG installations the gas in the tank would activate the pressure release valve and the contents would vent in a controlled manner, so the tank would not explode.

What if I was hit from behind?
All tanks are built to stringent standards, including impact tests, and due to their nature are more robust than a standard petrol tank.

What would happen if I had a gas leak?
A small leak might be stopped by applying a wet towel with protected (gloved) hands. Larger leaks would be detected by the system and the gas excess flow valve would be activated, shutting off the flow.

I have a classic car. When leaded petrol is phased out will LPG be OK for my car?
Yes it will, but you would still have the same problems with the engine that you would have converting to Unleaded petrol. The valves, valve seats and possibly the head would still need replacing with time.

Can my car be converted to run on gas?
For us to convert you car, it must have a petrol engine to start with. Or diesel. Engine in excess or 2.5litres with Turbocharger. There are some cars that we cannot do, but the majority are OK.

Why is it so cheap?
In a word "TAX"! Currently Excise Duty on LPG is 7.5p/ litre which is substantially less than petrol. The reason it is so low is that the government have recognised it as a greener fuel than petrol. How long it will stay low is open to debate. I estimate / guess that we have a minimum of another 8 years before they decide to put tax up, assuming large numbers of people have conversions done or buy pre-converted cars.
LPG is a by-product of the refining of crude oil and in the past could be viewed being burnt off in flame stacks at the refineries. This is another reason for the low price.

Will I still be able to use petrol?
Yes, all our conversions have a small dashboard switch that easily allows you to change back should you wish.The switch also incorporates a fuel gauge.

What are the down sides to having an LPG conversion?
i) The most common concern people have is that they will loose their boot space to a LPG storage tank. We stock a range of tanks which in an average family car leave in excess of 50% of the boot space still free. For example an cylindrical 80 litre tank measures 900mm long by 360mm diameter. They are always mounted horizontally, and usually against the back of the rear seats between the wheel arches. We also have available some do-nut shaped tanks to go in the spare wheel recess to keep the boot space intact. It's worth remembering that most people drive around with an empty boot most of the time so are largely unaffected.

ii) Due to the slightly lower energy content of LPG a power loss will be experienced. Typically this loss is minimal and generally people are happy with the result. We also have developed a performance gas manifold for minimizing and in some cases eliminating these losses on particularly large engines, such as big block American V8's. Should you have any large or unusual engines to convert, please feel free to call to discuss whether conversion is possible.

Can I do the conversion myself?
The short answer is no for safety reasons. We voluntarily abide by LPGA regulations. They specify that an installer of autogas equipment should be properly. We can provide equipment to installers subject to proper training or full LPGA approval. CORGI registration / approval carries no weight here. Please call us should you wish to become an installer. In certain instances single items can be supplied to repair old conversions.

How safe are conversions?
When done properly in accordance with LPGA CoP11 gas conversions are very safe. Obviously when carrying any fuel in a vehicle there is risk involved, but in many respects LPG is far safer than petrol. Most modern petrol tanks are made from plastic which in the event of a fire or impact will melt through quickly or break resulting in complete spillage.LPG tanks are steel which makes them much more resistant to impact damage and requires very high fire temperatures to melt. They are also fitted with pressure relief valves to protect against over pressure in the tank in the event of a fire or other over-pressure situations. These valves are designed to release some LPG to lower the tank pressure in a controlled manner.

How much will it cost?
Central Garage (Carcroft) conversions typically range from £1,000 to £1,400. It is rare that we charge more than this for single point systems, but some vehicles exceed these prices.

How many miles per gallon will my car do on gas?
On average 20% less MPG than on petrol. This figure is approximate. Some cars do more, and some do less.

Is it worth converting my vehicle to run on LPG?
Environmentally, yes. The levels of exhaust emissions are much lower than petrol or diesel vehicles.
Financially it makes sense. The current price per litre for LPG is approximately 30 pence whilst unleaded petrol is around 74 pence per litre.

Is LPG as safe as petrol for powering vehicles?
The carbon steel LPG tank is pressure tested to more than 30 bar and stores the gas at between 7 and 9 bar. No such pressure testing is performed on standard petrol tanks.
Lovato equipment incorporates electronic, manual and hydrostatic shut-off systems in case of failure. There are no systems of this kind in use in the petrol system.

Which vehicles can be converted to run on LPG?
Most vehicles can be now be converted to LPG. Please call us for a quote on your vehicle.

How many miles per gallon (mpg) can I expect running on LPG?
There is a small reduction in the mpg for most vehicles. For example, a vehicle with Multi Point Gas Injection doing 30 mpg on petrol would be expected to achieve approximately 27-28 mpg on LPG, however the current fuel price for LPG is about 50% of the price of petrol.

What differences will I notice running my vehicle on LPG?
Most drivers will notice no difference between petrol and LPG.

How do I know how much gas is left in the tank?
The system uses a switch for changing between petrol and LPG. Incorporated in this switch is a series of LED indicators which show the level of gas left in the tank.

How long will it take to convert my vehicle?
A standard conversion takes between 3 and 7 days.

Can I run my vehicle on LPG when I go abroad?
LPG powers far more vehicles on the continent than in the UK. All the adapters needed to refuel are available from Central Garage (Carcroft) for your conversion.

How long will it take for me running on LPG to recoup the money I spent on the conversion?
Obviously as each vehicle is different it is virtually impossible to answer this question generally. But you may wish to use our calculator at the bottom of the page.

What about servicing?
Service after 1,000-2,000 miles on a while-you-wait basis. We re-check all connections and ensure the engine tune is still correct. We also recommend an annual LPG system service. If your vehicle is going for routine maintenance the garage can ignore the LPG system.

What about my insurance?
Your insurance company must be informed of the modification to LPG although they generally do not charge any additional premium. Our certificate of installation that the work is to Code of Practice 11 is a guarantee of quality.

How long does conversion take?
Generally 3 - 7 days of workshop time with up to four weeks advance notice depending on workshop loading.

Can you convert diesel cars?
Yes but the conversion works as a supplemented fueling system, not a replacement as with a petrol engine.

Can I still run on petrol?
Yes, your vehicle is converted to dual fuel - petrol and lpg. A switch is mounted on the dashboard enabling you to select either fuel.

Does the vehicle have to be new?
No, providing the engine is in good condition we can convert most vehicles.

Where can I refuel?
A full list of LPG Refueling Stations is available on the LPGA website

How safe are the tank and gas supply leads if I have an accident?
In the event of an accident an excess flow valve will automatically shut off the gas flow, also there is controlled cylinder venting in case of fire.

What would happen if I accidentally added petrol or diesel to the gas tank?
Petrol or diesel cannot be added by mistake because the gas fuel nozzle only fits authorised LPG nozzles.

More practical user advice can be found in our knowledge page

Find a Filling Station

Plan a Route via Filling Stations

Return to LPG Introduction

For clear, no nonsense advice please speak to John at Central Garage (Carcroft)

TEL: 01302 722282



Central Garage (Carcroft)
Proprietor: J.& A. Padgett
High Street, Carcroft, Doncaster,
South Yorkshire DN6 8DP

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