LPG — often called Autogas at the pump — used to be one of the easiest ways to cut a household's fuel bill. It still shows up as a fuel type on FueVolt's price comparison because plenty of cars on the road were converted or bought new with it, but the case for it has changed a lot over the last decade. Here is what actually matters if you are weighing it up today.
What LPG Actually Is
Autogas is liquefied petroleum gas, stored in a pressurised tank and injected into the engine much like petrol. It is a different product from the bottled LPG used for home barbecues and gas heating — this guide is only about LPG as a vehicle fuel. Most LPG vehicles on Australian roads are dual-fuel: they can run on either petrol or LPG and the driver switches between tanks, usually automatically once the LPG tank runs low.
Price Per Litre vs Real Running Cost
LPG is usually the cheapest fuel type at the bowser by a wide margin — often close to half the price of unleaded petrol per litre. The catch is energy content: LPG holds noticeably less energy per litre than petrol, so an LPG engine burns more litres to cover the same distance. In practice this means the real saving per kilometre is smaller than the sticker price gap suggests, though for most drivers it is still a genuine saving, not just an illusion. Because the exact gap depends on your specific engine and driving conditions, the only reliable way to know your own numbers is to track a few tanks of each fuel in your own car.
Conversion Costs and Payback Time
Aftermarket LPG conversion is done by licensed workshops, not a DIY job, and not every engine is a good candidate — talk to a specialist about whether your specific make and model is suitable before committing. Conversion cost varies by vehicle and equipment, and it is not a small outlay, so it is worth asking a workshop for a written quote and an honest estimate of how many kilometres you would need to drive before the saving on fuel pays back the conversion cost. If you do low annual kilometres, the payback period can stretch out long enough that it is not worth it; high-mileage drivers — tradies, rideshare, regular long commuters — get there much faster.
A few practical questions worth asking before converting:
- Does the conversion affect your vehicle's factory warranty, and does the installer offer their own warranty on the work?
- How much boot space does the LPG tank take up?
- Does your insurer need to be told about the conversion?
The Federal Rebate Is Gone
If you are budgeting based on old information, be aware that the Australian Government's LPG Vehicle Scheme — which used to offer a rebate for buying a new LPG vehicle or converting an existing one — closed years ago and is not available for a conversion today. Some state or local programs have offered incentives at various times, so it is worth a quick check with your state's transport department, but do not assume a government rebate will offset the conversion cost.
Why LPG Cars and Bowsers Are Getting Harder to Find
Two things have squeezed LPG's place in the market. On the new-car side, factory dual-fuel LPG models — once common from local manufacturers — have largely disappeared from Australian showrooms as those model lines were discontinued. Second-hand LPG-converted cars are still out there, but the pool is shrinking as older vehicles age out of the fleet. On the supply side, as demand has fallen, fewer service stations bother stocking Autogas, particularly outside major cities — so before you commit to LPG, check FueVolt's fuel price comparison for how many stations near your regular routes actually sell it, not just how cheap it looks where it is available.
Is It Worth It in 2026?
For a high-mileage driver with a suitable, well-priced conversion candidate and reasonable LPG availability on their regular routes, LPG can still meaningfully cut fuel costs. For everyone else — low-mileage drivers, anyone considering a car without confirmed LPG availability nearby, or anyone hoping for a government rebate — the case is much weaker than it used to be, and an EV or a fuel-efficient hybrid is worth comparing against it too. Run the numbers for your own situation with FueVolt's EV vs Fuel calculator, and check current LPG coverage in your area before you commit either way.