Below are the answers to the most common questions you may have.

LPG stands for Liquefied Petroleum Gas also called autogas. When used for refuelling vehicles it is made up of propane and butane. It is a natural gas resource and is also a by-product of oil production and is an alternative to petrol or diesel.

Yes. Crash and fire tests have proved that the strength and integrity of tanks fitted to LPGA safety guidelines (CoP11) make the LPG fuel system safer than petrol. There are now over eight million LPG vehicles around the world. The tank and gas pipes are fitted with numerous safety devices. In case of accident the gas flow will automatically stop. If the vehicle catches fire, the gas tank pressure is controlled via cylinder venting, which will prevent the tank from rupturing and causing further damage.

Autogas is on average 50% cheaper than petrol. Furthermore road fund tax is far lower in recognition of its environmental benefits. There are also benefits such as a small reduction in Vehicle Excise Duty (VED) and reduced engine wear.

We are aware that systems are being developed to convert diesel engines to run on a mixture of LPG and Diesel (called Duel Fuel or LPG diesel blend) but we have not yet been provided with satisfactory test results for engine durability, emissions and sufficient savings. After such conversion you use 30% of LPG and 70% of diesel therefore it would be difficult to get a return on your investment soon. Accordingly we are not able to recommend such conversions at the present time. If in the future a company can demonstrate a system that is both mechanically reliable and reduces emissions, AgisAutogas will aim to facilitate that.

Running on LPG reduces your carbon footprint by on average 20% compared with petrol. Clean, efficient combustion means that LPG vehicles also produce fewer harmful pollutants and less noise. The simple chemical nature of the fuel ensures that it burns cleaner producing less polluion. LPG has the potential to make a huge difference to local air quality, particularly in urban areas. Government strongly emphasizes idea of greener living and use of LPG is one solution.

Modern LPG conversions which we install suffer no noticeable loss of performance. Engines will run smoother and be slightly quieter. LPG conversion will reduce engine wear. LPG burns cleaner than petrol. This means fewer emissions out of the exhaust and less carbon deposits in the engine. These deposits are very abrasive and can contribute to engine breakdowns. The oil and spark plugs will also last longer.

There are now over 1,500 LPG refueling stations in the UK. If you do run out then the car will automatically switch over to petrol. We recommend Morrisons refueling facilities which proved very good pressure and cheapest prices.

Most standard conversions take around 2 working days if you drop the car by 9am the first day.

The conversion adds a second independent fuel system, making the car bi-fuel or capable of running on either petrol or LPG. This requires a second tank, usually installed in the spare wheel well but can sometimes be installed underneath the car.
As with petrol and diesel, liquid LPG is bought by the litre and pumped into the tank via a hose and a filling point. It becomes a gas just before entering the combustion cylinder.

Yes. Built into the changeover switch is an LED gauge that indicates how much LPG is left in the tank.

You can't do this because the car's LPG filling point only accepts LPG hose nozzles.

No, because the LPG tank is fitted with an automatic shut-off valve.

Yes - you must inform the DVLA and qualifying LPG vehicles will obtain a discount on the road fund tax. We will issue a certificate to yourself which you then forward to DVLA.

All AgisAutogas systems are provided with a full 2 years unlimited mileage parts and labour warranty.

All Agis Autogas conversions are dual fuel so when the car runs out of LPG it will automatically switch to petrol but will also let you change from one to the other at the flick of a switch on the dashboard, without having to slow down or turn off the ignition. This is quite normal, hardly noticeable and causes no damage to your engine. The car will normally cold start on petrol and then quickly switch over to gas when the engine is warm. It is therefore important to have a little bit of petrol.

This depends on the vehicle to be converted. We offer very competitive prices and discounts. Contact us directly for a quotation.

The LPG system should be inspected annually or every 15000 miles (whichever comes first) by a specialist LPG technician. This normally takes about an hour and is consequently not expensive.

The system can be taken out and put on another car but there are some important issues to consider. Contact us for further details.

The Queen has two Rolls-Royces, a Daimler and a Rover running on autogas, and a refueling facility in the Royal Mews. The Duke of Edinburgh's Metro cab runs on LPG. The Prime Minister, the Deputy Prime Minister and the President of the USA all use LPG

LPG system is treated under Enhanced Capital Allowances when calculating your tax due. Government introduced 100% first year allowance until 2013. It means you can deduct 100% off conversion price against your taxable income. It will therefore reduce your tax payable or you may even qualify for a refund from HMRC. Contact us for more information.