Commentary: B50 matters, but miners should not bear the risks alone

By Adianto P Simamora

Indonesia has strong reasons to promote B50. Reducing dependence on imported diesel, strengthening the domestic biodiesel industry and shielding the economy from volatile global oil prices are legitimate policy objectives.

But national energy security should not come at the expense of mining companies and contractors. The transition will be sustainable only if the costs and risks are shared fairly across the supply chain.

The B50 program took effect on July 1 and was formally launched by President Prabowo Subianto in Karawang on July 9. The policy raises the share of palm-based biodiesel in diesel fuel to 50 percent, from 40 percent under the previous B40 program.

Companies may continue using their remaining B40 inventories until the end of September. Once the transition period ends, B50 will become the new standard for diesel users, including the mining industry.

The government estimates that the program could generate up to Rp 170 trillion in foreign-exchange savings. B50 is also expected to reduce imported diesel use and expand the market for Indonesia’s biodiesel industry.

From an energy policy perspective, the strategic logic is clear. For mining companies, however, the issue goes beyond the volume of diesel imports that can be reduced.

The more important question is whether B50 can be adopted broadly without disrupting production, imposing disproportionate costs or triggering disputes among mine owners, contractors, fuel suppliers and equipment manufacturers.

This matters because mining operations are fundamentally different from everyday vehicle use. Heavy machinery often operates almost continuously, frequently in remote areas. Fuel may also travel through a long and complex supply chain before reaching an operating site.

Even a minor disruption in fuel supply or quality can have an immediate impact on production. When one critical machine stops, the effects can spread across overburden removal, hauling, processing and commodity shipments.

B50 is therefore not simply a matter of fuel composition. For mining companies, it also involves supply certainty, operating costs, commercial contracts, equipment warranties and the allocation of responsibility when problems arise.

Promising trial, but questions remain

The government's field trial with PT Harmoni Panca Utama produced encouraging results. Two Komatsu HD785 haul trucks—one running on B40 and the other on B50—operated for nearly 1,000 hours without significant fuel-related engine problems.

The findings suggest B50 can be used in heavy mining equipment under certain operating conditions.

Encouraging, however, is not the same as conclusive.

Indonesia's mining fleets consist of equipment of different brands, models, ages and maintenance histories. Every mine also operates under different road conditions, workloads, climates and fuel-storage systems.

Results achieved at one site cannot automatically be replicated across older or differently maintained fleets elsewhere. Likewise, a trial lasting around 1,000 hours is insufficient to assess B50's long-term impact on engine performance and equipment life.

Information released so far also provides limited detail on maintenance records, filter replacement frequency, engine-component inspections or other indicators needed to evaluate long-term reliability.

The position of heavy-equipment manufacturers remains another area of uncertainty.

The government has stated that B50 met manufacturer requirements during the trial. Mining companies, however, still need a clear list of approved equipment models and confirmation that warranty protection will remain valid.

For mining companies, this is more than a technical issue. Manufacturer warranties have significant commercial value, and uncertainty over warranty coverage could lead to costly disputes if equipment failures occur.

The government should therefore encourage equipment manufacturers to state their positions publicly. Companies need clarity on which machines are approved for B50, under what operating conditions the fuel may be used and whether warranty coverage will remain intact.

Mining companies should not have to discover the limits of B50 through equipment failures in the field.

Costs and responsibilities

The trial found that B50 consumption was around 3.12 percent higher than B40. The figure may appear small, but its impact cannot be dismissed in mining operations that consume fuel on a very large scale.

Higher consumption means companies must purchase, transport and store more fuel to maintain the same level of production.

The burden may be greater for remote mines, where fuel delivery already depends on barges or long overland journeys. Additional fuel requirements will affect logistics costs and working-capital needs.

That does not erase B50’s strategic value. A higher biodiesel blend reduces the proportion of fossil diesel required, helping cut imports while supporting the domestic biodiesel industry.

The question is who will bear the additional cost of the transition.

Under some mining contracts, contractors purchase their own fuel and are paid according to production or work volume. In such arrangements, higher fuel consumption can directly squeeze contractor margins.

Under other arrangements, the mine owner supplies the fuel, placing more of the additional cost on the owner.

Many contracts drafted before the introduction of B50 may not address this change. They may contain no specific provisions on higher consumption, maintenance costs, operational disruption or equipment damage suspected of being linked to the fuel.

Mining companies and contractors need to review their agreements. The matter, however, cannot be left entirely to individual businesses.

Because B50 is mandatory, the transition needs firm rules on cost, quality and responsibility.

Fuel quality is a key concern. B50 may meet the required standard when it leaves the terminal, but contamination during transport or storage could leave it unsuitable by the time it reaches a mine.

Responsibility must therefore be established at every stage. Companies need to know who will take samples, who will test the fuel, when a shipment may be rejected and who will bear the loss if it fails to meet the required standard.

Mine operators must also prepare their facilities by inspecting storage tanks, keeping them clean and monitoring filters more closely. Fuel suppliers and transport companies, meanwhile, should remain accountable for the quality of the product they deliver.

B50 deserves to proceed because it can strengthen Indonesia’s energy security. But the transition must be supported by better information, reliable supply and workable rules.

Detailed trial results should be made available, including maintenance records and equipment conditions. Companies also need a list of equipment models approved by manufacturers for B50 use and confirmation that warranties will remain valid.

Regional supply arrangements and delivery-point quality standards must be established, along with responsibility for fuel or equipment problems. Mining companies, meanwhile, should review their contracts, suppliers, storage facilities, warranties and contingency plans.

B50’s success should not be measured only by lower diesel imports. It should also be measured by whether companies can obtain the fuel on time, use it without disrupting production and know who is responsible when problems occur.

B50 can support national energy security, but the policy will be sustainable only if its costs and risks are shared fairly across the supply chain.

Editing by Reiner Simanjuntak