Australia Reports 41 Days of Petrol Supply and 33 Days of Diesel in October 17 Update

Australia had petrol stocks equivalent to 41 days of normal consumption and diesel stocks equal to 33 days, Energy Minister Chris Bowen said on Saturday, October 17. Petrol cover was two days lower than a week earlier, while the diesel figure increased by two days. Jet fuel stocks were equivalent to 28 days, a two-day decline.

The figures came with an update on incoming supply. Bowen said 48 ships carrying fuel were on their way to Australia and 3.2 billion litres of fuel were contracted for delivery over the next four weeks. That forward-delivery volume was unchanged from the previous Saturday, even though the number of ships in transit had fallen from 51.

Bowen described the country’s fuel position as secure despite continuing international uncertainty during his October 17 press conference in Fairfield West, New South Wales. The report showed changes in the mix of petrol, diesel and jet fuel held by industry, rather than a uniform increase or decline across all three products.

Fuel cargoes continue to arrive as weekly figures shift

The minister said 75 ships carrying fuel had arrived during September, with another 51 arrivals recorded by the middle of October. Those are arrival counts for different periods, not a like-for-like measure of monthly imports. They do, however, help explain why the government is looking at both domestic stocks and the flow of incoming cargoes when describing fuel security.

In the October 10 update, Bowen reported 43 days of petrol, 31 days of diesel and 30 days of jet fuel. There were 51 ships en route, and 3.2 billion litres of various fuels were under contract for the next four weeks. A week earlier, on October 3, the contracted four-week volume was 3.6 billion litres. The October 17 reading therefore marked a second consecutive week at 3.2 billion litres, rather than an increase from the previous report.

The 3.2 billion litres covers fuel types collectively; it should not be read as 3.2 billion litres of petrol or diesel alone. Nor can the figure simply be added to the reported days of existing stock. The four-week estimate tracks contracted deliveries, whereas days of cover express stock levels against normal consumption. Some incoming shipments can also move into categories counted as domestic stocks as they approach or enter Australian waters.

A smaller number of ships at sea does not, by itself, establish a drop in fuel availability. The count is a changing snapshot of vessels still on the way, while cargo sizes and delivery schedules are not specified in Bowen’s October 17 statement. He said officials continued to work with trading partners in the Middle East and Southeast Asia, as well as with Australian refineries, as international fuel-market conditions remained unsettled.

What 41 days of petrol and 33 days of diesel mean

Australia’s domestic fuel-stock figures are reported through the Minimum Stockholding Obligation, or MSO, which covers major importers and refiners. The scheme requires participating companies to hold minimum amounts of petrol, diesel and jet fuel. Their stocks are reported weekly and can be expressed as the number of days those volumes would cover at normal rates of consumption.

That calculation is not a prediction that service stations will run out of petrol after 41 days or that diesel deliveries will stop after 33. It measures a stock position against a benchmark rate of use. Supply arriving from overseas, production at domestic refineries and actual consumption all affect the position over time. A national stock figure also does not describe availability at any particular filling station or regional depot.

The MSO measure reaches beyond fuel already stored in land-based tanks. According to the Department of Climate Change, Energy, the Environment and Water, it also includes eligible fuel in pipelines and certain Australian waters, along with qualifying crude oil and unfinished refinery stocks converted into refined-product equivalents. Those inclusions are one reason its days-of-cover figures should not be treated as a simple count of fuel sitting in retail storage.

For perspective, the department reported that industry stocks averaged 44 days of petrol, 36 days of diesel and 31 days of jet fuel in the June quarter of 2026. The October 17 figures were below those quarterly averages for all three products. The comparison is informative, but the June numbers describe a three-month average, whereas Bowen’s announcement is a single weekly update. Neither set, on its own, identifies the cause of the changes.

The domestic figures are also different from the International Energy Agency’s oil-stockholding measure, under which members are expected to hold oil equivalent to at least 90 days of net imports. That international measure uses net oil imports, covers crude and refined products together, and follows different accounting rules. It would be misleading to compare Australia’s 41 days of petrol directly with the IEA’s 90-day requirement.

Temporary reserve rules remain in place

Australia’s mandatory stockholding system has been operating since July 2023, but the government is temporarily allowing suppliers to hold 20% less petrol and diesel than their usual baseline requirements if they commit to making more fuel available in the domestic market and prioritising regional supply. The current extension runs through January 31, 2027. Officials linked the flexibility to demand pressures in regional Australia, including the grain harvest and summer holiday travel.

The change is a reduction in the minimum requirement, not a statement that actual national inventories have been cut by 20%. The department’s published requirements for the 2026-27 period, before temporary reductions, amount to 1,106 million litres of petrol, 2,827 million litres of diesel and 677 million litres of jet fuel. Compliance is assessed using volumes held by obligated importers and refiners, rather than a simple comparison between one national days-of-cover figure and a single required number of days.

Diesel has received particular attention in the fuel-security program because it supports freight transport, agriculture, mining and essential services. The government increased baseline diesel stockholding requirements in July 2024. In September 2026, it also said arrangements backed by the $7.5 billion Fuel and Fertiliser Security Facility were helping secure almost 800 million litres of additional diesel and 150 million litres of jet fuel. Those were supply-support arrangements, not quantities that should automatically be counted as fuel already in storage on October 17.

Separate longer-term proposals are intended to expand the country’s buffer against interruptions in imported fuel. A government consultation outlined a $3.2 billion commitment to establish an Australian Fuel Security Reserve, with a proposed government-controlled stockpile of one billion litres focused on diesel and jet fuel. The same package proposed lifting minimum stockholding requirements by 10 days for each of the three transport fuels and supporting continued operation of Australia’s two domestic refineries. Consultation closed in September; the proposals should not be confused with reserves already available for use.

For now, the weekly reports provide the more immediate test of Australia’s fuel position. Regulated companies report stocks held as of Tuesday, with aggregate statistics published on Saturdays. The next readings will show whether the rise in diesel cover continues, whether petrol and jet fuel recover, and how far the contracted import pipeline translates into fuel held in Australia.