Indonesia Rail Fleet Completes Preparation For B50 Biodiesel Transition

Indonesia, July 2026 — PT Kereta Api Indonesia (KAI) has completed preparations for the implementation of B50 biodiesel across its diesel-powered railway fleet, marking a significant step in Indonesia’s broader renewable energy transition. The move supports the government’s strategy to increase domestic renewable fuel utilisation while reducing dependence on conventional diesel.

The transition covers KAI’s key diesel assets, including locomotives and passenger power trains. Before implementation, the operator conducted technical evaluations with the Ministry of Energy and Mineral Resources to assess engine performance, fuel consumption, component durability, emissions performance, and operational reliability under the higher biodiesel blend.

The B50 programme, which contains a 50 percent biodiesel blend, follows Indonesia’s previous adoption of lower biodiesel mixtures, including B35 and B40. KAI stated that its railway equipment underwent testing to ensure the new fuel composition could be introduced without affecting safety standards or service continuity.

For the rail sector, the transition represents an important step towards reducing emissions from diesel-based operations, particularly for routes and assets that are not yet electrified. The implementation also highlights the growing role of alternative fuels in supporting decarbonisation strategies while maintaining the operational flexibility required for extensive railway networks.

As countries across Asia seek more sustainable transport solutions, Indonesia’s B50 adoption demonstrates how existing railway fleets can be adapted as part of the energy transition. The initiative highlights the importance of technical validation, infrastructure readiness, and gradual implementation when introducing new energy systems into critical transport operations.

Source: ANTARA News