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LPG van conversion - what you need to know

Is your van’s fuel bill out of control? With the rising cost of petrol and diesel, you might be tempted to look for alternative methods of topping up your van. An LPG conversion could cut your cost of filling up by up to 50% – plus make every journey a little bit greener. But is it worth the initial cost?

 
 

What’s an LPG van conversion?

Much kinder to your pocket and the environment, there’s much to like about liquid petroleum gas (LPG) for vans. It’s taxed lower than petrol and diesel, meaning you pay less to fill up your tank. Much less

Currently (December 2021) LPG costs around 69p a litre, partly due to LPG duty being far lower compared to petrol and diesel. So it costs around £65 to fill a Ford Transit. 

Contrast this to around £1.50 a litre for petrol and diesel, according to our petrol prices tool. This would cost around £140 to fill the same Transit. The potential savings are nothing to be scoffed at.

You can buy LPG across more than 1,250 UK fuel station forecourts. So, you never have to drive far to fuel up. Many are open 24/7 too.

LPG kicks out around 90% less nitrogen oxide (NOx) than diesel. As it produces fewer particulates, it’s better for your engine’s health, our health and our environment. 

 

How much does LPG conversion cost?

Adapting your petrol van to LPG might be on the steep side. We’ve seen prices as low as £1,200 but also as high as £2,000. Much depends on the age of your vehicle.

If you have a relatively new van, its engine might rely on a direct injection system.

Typically, direct injection engines are more fuel efficient. They generate more power and better fuel economy, sometimes from a smaller engine capacity. 

But traditional LPG conversion systems aren’t a great fit for modern engines built to withstand tough emissions standards. 

The newer the tech, the more expensive the LPG conversion cost might be. This might wipe away any potential savings you'd get from the lower fuel costs.

If you’re considering LPG long-term, call around some LPG converters in advance. DriveLPG has an approved list of installers.

Dutch alternative fuel company Prins, however, does offer LPG systems for modern vans and cars.

 

Is it worth converting my van to LPG?

If you're in it purely for the savings on fuel costs, switching to LPG could be worth considering. Given that fuel duty on LPG is around 32p per kg (roughly 16p per litre) compared to 58p per litre of petrol or diesel, you can quickly see the potential savings.

As for safety, independent tests show that LPG is at least as safe in a crash as a petrol vehicle.

That’s partly because LPG containers tend to be made of thick-gauge material. This rigidity is important in the event of a crash.

If you drive in or around London, watch out for congestion charges. If your petrol van meets Transport for London’s (TfL) Euro 4 emissions standards then it should be compliant with the Ultra Low Emission Zone (ULEZ). You can check on the TfL website.

For diesel vans you must meet the Euro 6 standard TfL. There are retrofit options through the Clean Vehicle Retrofit Accreditation Scheme.

Since 25 October 2021, TfL’s cleaner vehicle discount changed so that only battery electric or hydrogen fuel cell vehicles are eligible. And from 25 December 2025, this discount evaporates too.

 

What are the drawbacks of an LPG van conversion?

LPG isn’t as fuel efficient as diesel or petrol. You might see a 15-20% rise in fuel consumption as a result. That means there’s less range running on LPG only – though with two fuel tanks you’ve got more range overall.

But LPG’s per litre cost saving means you’re still likely to be way ahead than with a petrol or diesel model.

An LPG tank also needs an annual check-up to make sure it's running smoothly.

Depending on where you live, you might find that compatible filling stations are a bit more scarce. But if you plan ahead a bit you should be fine.

One LPG downer that doesn’t get much attention is van choice. A lack of demand for non-diesel vans means a somewhat sparse model menu, particularly when buying new.

It’s a bit of a vicious circle – the lack of supply means a lack of demand.

But as we get nearer a net-zero world, it could be that cleaner-burning LPG becomes part of the used van market for some time.

There’s one more downside. For health and safety reasons, LPG-equipped and dual-fuel vehicles aren’t allowed in the Channel Tunnel.

 

What are the pros and cons of an LPG van conversion?

Pros:

  • Cheaper running costs due to lower fuel duty
  • Better for the environment than petrol and diesel due to lower NOx emissions
  • Negligible difference in performance compared to other fuel types
  • Potential van tax reduction as an alternative-fuelled vehicle
  • Residual value could be strong, especially in areas affected by congestion charging

 

Cons:

  • It could take at least 18-24 months to recoup the cost of installation

  • LPG conversion adds weight to your van, which could compromise on fuel efficiency

  • Less availability to refuel compared to petrol and diesel

  • An LPG system needs annual servicing checks.

  • If you have a newer van, the cost to install LPG could be quite high

 

Does an LPG conversion affect my van insurance?

If you convert your van to LPG you must tell your van insurance provider. That’s because any conversion could be classed as a modification.

And van modifications could see your van insurance costs go up.

Once your van’s converted it’s placed on the Liquid Gas UK Vehicle Register. This helps to protect its resale value. 

Being eco-conscious on the road usually means driving in a more defensive, measured manner.  So, environmentally-minded drivers could be thought of as a lower risk, which could result in lower insurance costs.

It's worth speaking to your insurer beforehand to see if converting to LPG might impact your policy. And if your costs go up, it’s worth shopping around for an policy that suits your needs and your wallet. If you're looking for other ways to cut your van insurance costs, check out our guide on how to save on your van insurance.

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How do I install LPG in my van?

Get your van conversion done from an approved LPG converter. The LPG installation process is highly technical, and not one for the weekend DIY-er, however confident or capable.

There's a list of fitters on the Liquid Gas UK website, who are the UK trade body for LPG. Your insurance company might much prefer an official conversion too.

Bear in mind that if you do attempt to modify your vehicle in any way, your insurance policy could become more expensive or even invalid.

 

How do I fill a van with LPG?

It’s easy and similar to filing up with petrol or diesel:

  • Take the fuel nozzle out of the pump holdall, as normal. Your van’s LPG fuel entry point is usually fixed on the side of the van.

  • Push the fuel nozzle over your LPG tank fuel lugs.

  • Turn the small pump barrel clock-wise to ‘lock’. After this you squeeze the nozzle grip into the ‘open’ position.

  • After this, push the ‘on’ or ‘flow’ button on the LPG pump itself. This should automatically stop refilling your van when full up.

  • When you then release the filler nozzle, it’s common to hear the sound of a little gas escaping. This is quite normal.

  • Then, twist the barrel anti-clock-wise and replace in the holdall.

If you’re travelling in Europe and you’re filling up an LPG tank – you might need LPG converter connectors. You can buy these online.

They usually go under the name of LPG Travel Adapter Kit – or something similar. There are different connectors for different countries.

 

Can I convert my diesel van to LPG?

You can, but the savings aren’t so spectacular. Also, one of the main benefits of diesel is that it gives you more range compared with petrol-powered vehicles. If you run mainly on LPG, that advantage tends to get lost.

Overall, the combination of diesel and LPG doesn’t do much for emissions or air quality. It might not be worth your while.

While most vans are diesel-powered, petrol van sales are rising because of the reputation of ‘dirty diesel’. This is a slight shame as the latest diesel Euro 6-engined vehicles are highly efficient and relatively ‘green’.

If you’re in the market for a new van, it could be worth considering your electric van options too. Especially if you do a lot of short hops or city centre stop/start driving.

 

What are the other fuel options for my van?

Much of it will depend on your van budget. Electric vas are an option, but it’s an expensive one for many pockets.

Vans are changing too. Traditionally payload – the overall weight you can safely load – has been a manufacturing priority.

But demand among couriers for low-emission vehicles doing ‘last mile’ hops means cargo volume is now just as important.

There’s still the government’s Plug-in Van Grant. This gives a maximum £6,000 off the price of a van between 2,500kg and 3,500kg.

The van has to be able to travel at least 60 miles with zero emissions. These 100% electric van models include:Citroen e-Dispatch, Fiat e-Ducato, Mercedes eSprinter, Renault Master ZE, Toyota Proace Electric, Vauxhall Vivaro-e, VW ABT-e-Transporter.

There’s also up to £3,000 off the list price for small vans.

 

Should I get a hybrid van instead?

Hybrid vans have electric motors added to their petrol or diesel engines. The Ford Transit Custom Plug-In is a good example.

But for long distances, think carefully about electric motor and petrol (or diesel) combinations. A traditional arrangement might serve better – including LPG conversions.

For most van makers, it makes better commercial sense to go straight to the 100% electric market. But pay attention to battery sizes, which could affect your ultimate driving range.