Fuel Supplier Australia: A Practical Guide to Bulk and Commercial Diesel

A fuel supplier in Australia is paid to put the right diesel in the right tank, on a window the site can accept, and to leave a docket the invoice cannot argue with. The cent per litre is the last test. It is meaningless if the grade, the truck or the litres do not join up.

Site managers, fleet controllers and farm operators comparing fuel supply services usually hold two or three emails that each quote a number and describe a different job. Separate the product, the cartage, the site rules and the invoice basis before you rank those emails. A servo can still fuel a ute. It cannot run a mine fuel farm, a harvest or a depot that burns thousands of litres a week.

What a fuel supplier is being paid to do

Retail is built for vehicles that drive to a bowser. Contract supply is built for tanks, plant and windows. Mix them and a yard ends up with a card account for trucks that should have filled at the shed, or a bulk quote for a volume that will never pay for the truck.

Product on the account

Commercial diesel is a specification. Automotive diesel sits under the national fuel quality standard, which caps sulfur at 10 mg/kg and sets a minimum flash point, so the product is handled as a combustible liquid and stored against AS 1940. Ask which grade is loading, whether the load is mineral diesel or a biodiesel blend, and which terminal it lifted from. Long storage and older plant both get harder when an unspecified blend turns up. AdBlue is a different product and a different fill point. It never shares a diesel hose.

A terminal certificate describes the product at the rack. It does not describe your tank three weeks later. When a filter tells you something is wrong, take a retain and use fuel testing while the docket is still easy to find. Agree who samples, who pays, and what result changes the commercial outcome before anyone is angry.

How commercial diesel buying works

Imported or refined diesel sits in seaboard terminals. In Western Australia that rack is the Kwinana precinct. Other capitals have their own. A supplier lifts a tanker there at a wholesale price tied to the terminal gate price, or at a negotiated differential, then carts it to your tank. The invoice is that wholesale product, plus freight, plus a truck and a driver at the site.

The buy takes a few shapes. Call-off orders suit uneven burn. A standing order suits a steady yard. A term contract suits volume you can forecast, with a formula instead of a fresh argument every load. Credit, who may order, and which sites sit on the agreement are the account. Commercial diesel is that account. Bulk supply is the metered drop into a tank you control. You can hold an account with no tank, or own a tank supplied on a handshake. A complete arrangement writes both down.

Yard tanks and vehicles that never come home

Put the heavy, predictable burn on scheduled bulk into a tank you dip. Use a fuel card for light vehicles and one-off trips that will never pass the yard. The card price is a retail or truck-stop price. The bulk price is a landed wholesale price. Averaging them into one fuel spend hides which system is expensive. Name who may draw from the bowser, and which vehicles stay on the card, so the tank reconciliation still means something.

Terminal gate price against a landed cent

The Australian Institute of Petroleum publishes weekday terminal gate prices for diesel at the major terminals. The series buyers use is a wholesale price for a load collected at the gate. On the AIP notes that figure includes excise and excludes GST. It also excludes freight to your site, any supplier differential, waiting time and retail margin. Name the terminal. A Kwinana diesel TGP is the reference for a load lifted in Kwinana. A Melbourne or Brisbane number is a different market on the same day.

Landed cents per litre is what that drop costs at that address, ex GST. Start with the named TGP. Add the differential. Add freight for that vehicle, that distance and that drop size. Keep minimum-drop uplifts, waiting and after-hours as their own lines so two quotes can be added the same way.

A worked build-up on a dummy terminal price

Use 100.00 cents as the reference TGP so the sums stay visible. Your live TGP will not be 100. Add a differential of 6.50 cents. A metro drop on the ordinary freight rate might add 3.80 cents. Landed metro is 110.30 cents ex GST. The same formula on a remote run might add 16.00 cents of freight. Landed remote is 122.50. Same supplier, same diesel, twelve cents apart because of the road. An hour of waiting past the free time belongs back on those litres as well.

An email that says 108 cents delivered still needs the week, the drop size, the waiting clock and whether GST is inside the number. AIP TGPs are ex GST, and a GST-inclusive quote sits about ten per cent higher. Compare ex GST. Leave fuel tax credits out of the supplier's cent.

Own fleet and brokered cartage

Own-fleet fuel transport means the supplier rosters a truck they control, driven by someone on their books, maintained in their system. Dispatch and the driver share a radio. When a gate rejects the combination, the same business already knows the induction expiry, the vehicle spec and what else is on the road.

Brokered cartage means the supplier sells the litres and hires a truck for the run. That fits an awkward one-off, a region outside the supplier's own trucks, or a peak week that would otherwise leave a contracted site short. The subcontract driver is often missing from the site access system. The unit that arrives is a different combination from the one approved. Two companies are on the phone, each holding half the story. On a tight morning the spot truck goes to the load that pays the spot rate.

Plenty of sound suppliers run their own trucks on the core routes and broker the overflow. Write the standard onto the cartage sheet: same induction lead time, same accreditation, same hose and meter practice, same person you call. Ask who employs the driver on this site's loads. If that truck is already committed, what is the next unit, and is it still inside the same approval? Who pays the waiting time if the substitute is refused at the grill?

Heavy vehicle accreditation

The truck is a heavy vehicle before it is a bowser on wheels. In Western Australia the scheme that matters for concessional and restricted access is Western Australian Heavy Vehicle Accreditation. WAHVA covers fatigue, maintenance, and dimension and loading for operators who need it. WA sits outside the Heavy Vehicle National Law, so an answer that only says NHVAS has not answered the WA question. In HVNL states the matching conversation is the National Heavy Vehicle Accreditation Scheme, module by module: maintenance, mass, and the fatigue level the driver is actually running.

The quote assumes a combination that can legally run the hours, including the unload and the drive home. A site that holds a driver for ninety minutes can bust the remaining hours and strand the truck. Ask which scheme, which modules and which fatigue regime apply to the vehicle booked for your address.

What the management systems change

ISO 9001 is the quality system, ISO 14001 the environmental system, and ISO 45001 the safety system. A certificate means an outside auditor has tested how the company says it works. Atlas Fuel's tanker fleet holds WAHVA, and the business holds ISO 9001, ISO 14001 and ISO 45001. Use that as evidence of a system, then test it: lead time on your route, who attends a disputed load, and how a spill at the coupling is stopped and reported. The dip and the bund still belong to the delivery day.

Getting the tanker on site

Most failed deliveries are access failures. Send the driver name, licence class, registration and combination type before the window. Mines often add a medical, a drug and alcohol rule, a verification of competency, a radio channel and an escort to the fuel farm. Ports inside a maritime security zone need a Maritime Security Identification Card for unescorted access, plus a berth window. Farms fail on a soft track, a low line, a locked gate or a tank the hose cannot reach. Metro yards fail on a changed code or a workshop blocking the pad.

Different sites, different constraints

Mining fuel supply lives or dies on the induction and the shift window. Agriculture fuel supply lives or dies on the track, the tank position and a burn rate that doubles in seeding and harvest. Marine fuel supply is a tide and a berth, not a street address. A commercial yard usually fails on a Monday gate or a tank nobody dipped on Friday. Onsite diesel delivery can cover all four only if the schedule admits which job wins when trucks are tight. A supplier who learns your site on the first live load will spend your shift doing it.

Pump, hose, vent and someone watching the level

The unload is a small hydraulic job. Confirm the coupling before the first load. Camlock is common on farm and site tanks, and the size still has to match the hose. Many tankers discharge with a PTO-driven or hydraulic pump, so the engine runs at a set speed. A site rule that wants the engine off needs a different setup, agreed before the day. Gravity discharge only works where the elevation and the valves can hold a controlled rate. Start slow, watch the joints, then come up to rate. If the vent is smaller than the fill rate, the tank burps, gauges lie and joints weep. A shut valve against a running pump cooks seals. Agree who may touch the tank valves.

Somebody watches the level. The driver cannot see inside a closed tank unless there is a gauge, a whistle vent or a person on the dip. Stop at safe fill: working capacity, minus ullage, minus any water bottom. A tank filled hard in the cool of the morning can push product as the day heats up. Bond if the site requires it. Keep the hose off live traffic, keep a spill kit at the connection, and keep the bund clear of stormwater. Stay with the hose until the meter stops.

Dips, gauges, density and temperature

Dip or gauge before the hose goes on. Record the reading, the time and the tank identity. Water-finding paste on the bottom of the stick tells you whether the lower layer is diesel or water. Clock gauges stick. Electronic gauges drift. Prove them against a manual dip on a schedule, and again after any mismatch worth arguing about. Nameplate capacity is the shell. Working capacity is what you may put in. Ullage is the space you leave so expansion and the vent still have somewhere to go. Water in the bottom is not diesel, and it steals that much room as well.

Volume moves with temperature. As a field rule of thumb, diesel changes by about 0.08 per cent for each degree Celsius. The proper correction depends on density and sits in the volume-correction tables to 15°C, the temperature Australian wholesale volumes are usually reconciled to. Automotive diesel density commonly sits in the low-to-mid 800s of kilograms per cubic metre at that temperature. A load metered at 30°C and dipped after it has cooled toward 15°C will look short by about 1.2 per cent. On a 20,000 litre drop that is roughly 240 litres. It is a reconciliation item, not automatically a missing compartment.

Ask whether the truck meter is temperature-compensated to 15°C or printing observed litres, and compare like with like. Dip again once the surface has settled. A long horizontal tank still moving will lie. Agree a band wide enough for gauge error and a normal temperature swing, tight enough that a wrong tank or a leaking compartment shows up while the driver is there. The docket needs meter start and finish, litres, tank identity, time and a signature from someone allowed to accept fuel. Title on a delivered sale usually passes as product enters the nominated tank. Confirm that tank before the valve opens.

Water bottoms, contamination and filtration

Diesel can leave a terminal inside specification and still pick up trouble in a tired tank or a careless transfer. Free water enters as the tank breathes, past a perished hatch, through a vent sitting in a flooded bund, or from a compartment that was not drained. Water is heavier than diesel and settles. Sediment and rust travel with flow. Cross-product comes from a manifold that last saw petrol, a hose used for more than diesel, or a fill point nobody labelled.

Microbial growth, the diesel bug, lives at the fuel-water interface. Slime and acids follow. Filters that used to last a season block in days, and the product smells sour. Permanent water bottoms, and blends that hold more moisture, are where it shows up. Drain the sump on the interval the tank design allows. A farm tank with no water draw needs a tank that can be drained, or a polish through filters. A clean load pumped onto a water bottom does not remove the bottom, and the first draws off a low outlet can send that water to the machines.

Particulate and water-absorbing elements on the outlet, changed on differential pressure, are the last defence for tanks that feed modern engines. Common-rail gear is less forgiving than older mechanical injectors. Ask whether diesel compartments are dedicated and whether the manifold is drained between products. If a load looks, smells or filters wrong, stop, isolate that tank from the machines, and sample the tanker before the product mixes if you still can. A jar filled only after mixing cannot separate a dirty delivery from a dirty vessel. Disputed loads, a supplier change and a fresh tank are when a lab earns its fee.

Fuel tax credits and the records

Fuel tax credits hand back the excise already charged on diesel used in eligible business activities. The claim goes through the BAS. Rates move. Excise is indexed, typically in February and August, and the on-road credit for heavy vehicles is reduced by the road user charge. Budget the mechanism and look up the current ATO rates when you lodge. Do not freeze last year's cents into a supply contract and call it a saving.

Off-road business use, covering a lot of mining, agriculture, construction off public roads, marine and stationary plant, generally attracts the full credit rate for that fuel. Diesel burnt in heavy vehicles over 4.5 tonnes gross vehicle mass on public roads generally attracts the smaller credit. Light vehicles at or under 4.5 tonnes on public roads generally sit outside it. A farm ute can be eligible for the paddock portion and ineligible for the highway portion of the same tank. This is operational orientation, not tax advice. The ATO and your accountant outrank a supplier brochure.

One tank that feeds two kinds of work

A bulk tank feeding a loader and two highway trucks is the claim a review will look at. The docket proves purchase: date, product, litres, supplier. A use record has to split off-road litres from on-road heavy-vehicle litres. A bowser meter by asset is the clean version. A percentage from a sample period works if you write it down and review it when harvest, a shutdown or a new highway contract moves the mix. Private haul roads and public roads are different activities. Keep the working papers for five years. The supplier can separate dockets by site. Eligibility stays with you.

Contract terms that show up on a bad week

Indexation

A usable price clause names the series, the terminal, the product, the GST basis and the lag. A weekly average of that terminal's diesel TGP, ex GST, plus a fixed differential, invoiced the following week, is a clause you can re-perform. Day-of-lift pricing tracks a fast market. A prior-week average is easier to job-cost and lags a spike. State the differential in cents per litre and what would make it change. A one-sided review on short notice will take back an opening rate that looked sharp. Holiday loadings and after-hours premiums belong on the same schedule.

Volume, allocation and force majeure

Volume commitments need a unit and a consequence. Monthly litres, a tolerance such as ten per cent either side, and a date for nominating harvest or shutdown peaks, give the supplier something to roster. Read what the commitment attaches to. A fee on the freight reservation is a different deal from take-or-pay on the full landed price. A forecast the tank cannot accept will turn into a waiting-time argument on the day.

When a terminal is on allocation, some contracts supply pro-rata against recent offtake and some protect contracted volume while spot buyers are cut first. If the answer is that the supplier will try, you are in the spot queue in practice. Force majeure should name real events: rack outage, ship delay, road closure, cyclone, flood, a government direction. It should require notice, say whether another terminal they normally use must be attempted, and state what happens to that week's volume commitment. A clause that excuses any supply difficulty will be used on a tight Friday. During a genuine outage, cover equals the diesel already in your tank.

Put the site clauses beside the legal ones. Free waiting minutes, and whether the clock starts at the gate, at the fill point or when pumping starts. A forty-minute mine escort eats a gate-started allowance before the hose is out. Minimum drop for that address. A quality-claim window in hours, with the retain rule. Payment terms and the credit limit. Exclusivity is only comfortable if the shortage clause still feeds you when product is tight.

Comparing two quotes on one page

Give every supplier the same brief: addresses, working capacity, monthly litres and the worst week, delivery windows, combination limits, product grade, who signs, and whether night cover is required. Score fleet control, lead time, quality process, price transparency and after-hours response beside the cent. The wider buying guide is the companion when you want the full comparison, not only the bulk and commercial slice. Rank the landed ex-GST result for your actual drop, then price a missed load in stopped plant, a lost tide or a harvest day.

• Named TGP series, excise in, GST out, plus the differential and the lag.
• Freight shown for each address and drop size, not one national cent.
• Minimum litres, free waiting minutes, the clock start, and the rate after that.
• After-hours and public-holiday treatment written as numbers.
• Who employs the driver, and the next unit if that truck is committed.
• Lead time on a normal day, and the lead time after a missed cut-off.
• Quality claim path, sample point and who pays for the lab.
• Shortage rule: contracted volume, pro-rata, or best efforts.

Metro runs, remote runs and the clock

Metro and remote work share a molecule and little else. A metro drop is often a shorter lead, a smaller vehicle and a tighter gate. Miss the afternoon cut-off and the rack, the driver's hours and the next day's board are already full. Remote work carries more of the landed cent in freight, wants larger drops and runs on nominated days. Road trains and B-doubles belong only where the route and the pad are approved. Shire curfews, wet-weather bans and harvest permits can close a rural window the map still shows as open.

Distance and difficulty are different problems. A security-regulated port can be harder to enter than a Wheatbelt farm, and a metro yard at 6am can be harder than a mine taking fuel on night shift. Working capacity minus the water bottom, divided by peak daily use, is cover in days. Set that against lead time plus one missed run. If cover is the shorter number, you will buy emergency freight however sharp the contract cent is.

Minimums, free time and who may order

Ask for the minimum on your route and vehicle. Remote minima sit higher. If the tank cannot take the minimum, the quote is unfinished until you change the tank, the frequency or the vehicle. A second stop on the same run can carry a different minimum. Name who may place the order. A duplicate load from a night supervisor becomes waiting time, or a tank with no room left. Terminal queues, driver start times, public-holiday rack closures and your own shutdown belong on one calendar.

After-hours drops

Night supply needs a region, a person and permission. Who answers. What volume can still move once the planned truck has left. Whether the induction and the remaining fatigue hours allow that driver in. Lighting and someone who can sign are site jobs. Atlas Fuel provides 24/7 emergency onsite diesel across Perth, Kwinana Beach and regional Western Australia. That path covers those areas. Emergency freight should cost more than a planned load. If you need it every week, the reorder point is wrong.

When a Kwinana own-fleet supplier is a fair benchmark

Atlas Fuel is a useful ruler when the work looks like the work it does. It is a 100 per cent Australian-owned supplier, operating from Kwinana Beach since 2010, with its own tanker fleet. Customers are in mining, marine, agriculture and commercial. Stated supply is centred on Perth, Kwinana Beach and regional Western Australia, and also includes Queensland and Victoria. The dispatcher and the driver sit in the same business, which is the right comparison when another quote cannot say who owns the truck or which yard it leaves. The WA fleet sits under the WAHVA accreditation already described. Apply the same landed build-up, lead time and access notes you would demand from anyone else.

Set that build-up beside a brokered cent that has no freight line. A card spend with no tank, or a region the trucks do not run, needs a different comparison. Ask for a quote with addresses, working capacities, peak litres and the windows. The site will not honour a price built without them.

FAQs

Frequently Asked Questions

Straight answers to the questions site managers, fleet controllers and farm operators usually raise before locking in a fuel account.

Why did the dip move less than the meter ticket?

Check tank identity, the meter start and finish, and whether the ticket is compensated to 15°C while the dip is observed volume. About 0.08 per cent per degree opens a visible gap on a warm load dipped cool. Check the water paste, then let a horizontal tank settle before you re-dip. If the gap is still outside the agreed band, keep the driver there and hold a retain.

The water paste showed a bottom before we unloaded. What is the sensible call?

Treat the water as your tank's condition, then decide whether clean working capacity can still take the drop. Drain the sump if the tank allows it. If it does not, isolate the machines and plan a pump-out or a polish before the hose starts. A low outlet will pick that water up first. If you also doubt the truck compartment, sample before discharge and use the testing path already written into the account.

How do we keep fuel tax credit records when one tank feeds plant and highway trucks?

Keep the docket as proof of purchase: date, product, litres, supplier. Keep a use record that splits off-road draws from diesel used in heavy vehicles on public roads. Meter the bowser by asset, or document a percentage and review it when the season changes. Off-road use and on-road heavy-vehicle use attract different ATO rates. Light vehicles on public roads generally sit outside the claim. Check the current rates before the BAS, and keep the working papers for five years.

What has to sit next to a TGP-plus price for the invoice to be predictable?

Name the terminal, the diesel series, that the figure is ex GST and includes excise, the differential in cents per litre, and the lag. Day-of-lift and a prior-week average produce different invoices in a moving market. Freight needs a schedule by zone or drop size. Add minimum litres, when the waiting clock starts, after-hours hours and public holidays. You should be able to rebuild the invoice from the published terminal gate price and the contract schedule without ringing anyone.

The supplier cited force majeure because the rack is tight. What should that clause have said?

A fair clause names events outside the supplier's control: a terminal outage, a ship delay, a road closure, cyclone, flood or a government order. It requires prompt notice, and it says whether another terminal they normally lift from must be tried first. A tight market on its own is an allocation question. The contract should already say whether contracted litres are protected or everyone goes pro-rata. Best efforts is the spot queue. During a real outage, cover is the days of diesel already in the tank.

A substitute driver is at the gate and the induction system has never heard of them. Who carries the wait?

The supplier who sent a truck that was not cleared, unless your gate was the delay. Write the rule in the account: names and combinations approved ahead, a backup driver already inducted, and waiting owned by the supplier if their replacement is refused. On a brokered load, put that rule on the cartage sheet so the subcontractor is not a surprise at the grill. Your side is a current list and a person who can answer.

What filtration is worth fitting on a tank that feeds modern diesel engines?

Fit particulate and water-absorbing filtration on the dispensing side, and change elements on differential pressure. Common-rail engines tolerate less dirt and water than older mechanical plant. Draining the water bottom does more for filter life than a finer element downstream of a wet sump. If a load blocks filters immediately, isolate the tank and sample before that product reaches the rest of the fleet.

When is an own-fleet supplier based at Kwinana a fair benchmark for our landed price?

When you take bulk diesel into tanks in Western Australia, or on a Queensland or Victorian site that supplier actually schedules, and you can rebuild the cent from a named yard with the driver on the company books. Compare the same drop, the same address, ex-GST TGP plus differential plus freight, and the same after-hours rule. Atlas Fuel is that comparison from Kwinana Beach, on its own tankers. A national card spend with no tank, or a region those trucks do not run, needs a different ruler.