If you're refuelling utes, tractors, generators, boats or worksite gear, the choice between a diesel transfer tank and a petrol transfer tank isn't just about what fuel you burn — it changes the pump, the venting, the safety gear, and how the tank can legally be transported in Australia. Here's the plain-English breakdown, plus the spec callouts that actually matter when you're standing in the shed deciding what to order.
The short answer
Pick diesel if you're refuelling diesel utes, tractors, headers, generators, excavators, or any modern Aussie work fleet. Diesel is the default for portable bulk refuelling — slower-burning, much lower vapour pressure, and far easier to store and transport safely.
Pick petrol only if you specifically need to refuel petrol-only equipment — landscaping crews running 2-stroke gear, motorsport pits, marine outboards, or chainsaw/whipper-snipper fleets. Petrol tanks are built tougher (vapour control, earthing, sealed pumps) and cost more because they have to be.
Almost everyone refuelling work vehicles in Australia ends up on diesel. The exceptions are small but real — and getting the wrong tank for petrol service is a genuine safety hazard, not just a warranty issue.
Pump and flow rate
Diesel pumps in portable tanks typically run 40–56 LPM at 12V. That's fast enough to fill a 100L ute tank in under 2 minutes. Joey's 210L Diesel Transfer Tank uses a 40 LPM 12V pump; the 1000L Diesel Tank with Hose Reel runs 56 LPM with optional 230V mains.
Petrol pumps run faster — typically 57 LPM — but every component in the fuel path has to be petrol-rated: explosion-proof motor housing, vapour-tight seals, anti-static hose. That's why Joey's 210L Petrol Tank and 330L Petrol Tank carry a premium over equivalent diesel units.
Don't be tempted to put petrol through a diesel pump or vice versa. The seals aren't compatible, the motor isn't rated for petrol vapour, and you'll either kill the pump or start a fire.
Safety, venting and regulations
Diesel has a flash point above 60°C, which is why it's classified as a Combustible Liquid (Class C1) in Australia rather than a Dangerous Good for transport in modest quantities. Petrol's flash point is around −40°C, putting it in UN1203 Class 3 Packing Group II — Flammable Liquid territory, with proper ADG (Australian Dangerous Goods) code obligations for transport in larger volumes.
Practically, a portable diesel tank under 1,000L is generally carried on a ute or trailer with minimal paperwork. A petrol tank of the same capacity typically needs anti-static earthing, dedicated venting/breather, sealed lid, and you'll need to mind ADG limits and placarding rules above the threshold. Compliance with Australian Standards and state regulations is the operator's responsibility — Joey does not provide regulatory certification, so confirm your situation with your insurer and the current rules in your state.
Both tank types should be lockable. Both should sit on a stable, level surface during refuelling. Neither should be near ignition sources, and you should always have a dry-chemical extinguisher within arm's reach.
Cost and total spend
Like-for-like, expect a petrol transfer tank to cost 15–25% more than a diesel tank of the same capacity. That's the cost of explosion-proof components, not a markup.
Diesel tanks also win on operating cost: fuel itself is cheaper per litre for fleet refuelling, equipment runs longer between refills, and the tanks are simpler to service. If your fleet is mixed, most owners buy a larger diesel tank as the primary unit and keep a smaller petrol tank for the 2-stroke gear.
Quick comparison table
| Factor | Diesel Tank | Petrol Tank |
|---|---|---|
| Typical 12V pump flow | 40–56 LPM | 57 LPM |
| Flash point | > 60 °C (Combustible) | ≈ −40 °C (Flammable, Class 3) |
| Transport regs (AU) | Light — minimal paperwork < 1,000 L | ADG-controlled, earthing required |
| Pump cost driver | Standard 12V DC motor | Vapour-tight, explosion-proof |
| Typical buyer | Farms, civil, fleets, mining support | Landscaping, motorsport, marine |
| Price (like-for-like) | Base reference | +15–25% |
Frequently asked questions
Not sure which capacity to grab?
Most fleets land on the 400L diesel for the right mix of capacity and portability. Have a look or give us a call — we'll match the tank to your kit.
