JAKARTA, July 24 (Reuters) - Indonesia, the world's most significant palm oil manufacturer, is evaluating fuel with a view to increasing to 40% from 35% the share of palm-oil mixed into biodiesel next year, the energy ministry said.

If executed, the B40 mandate might increase biodiesel intake to as much as 16 million kilolitres (KL) next year, the ministry stated, from 13 million KL estimated to be consumed in 2024.

"We hope the trials might be finished in December, so that complete implementation of B40 could be performed in 2025," energy ministry senior main Eniya Listiani Dewi stated in a statement on Tuesday.

The Indonesian Biofuel Producers Association (APROBI) stated the industry had the capability to meet B40 need, with installed capacity expected to increase to 20 million KL every year next year from 18 million KL now.

"However we will need more basic materials to meet B40 need," Ernest Gunawan, the secretary general of APROBI informed Reuters on Wednesday.

The biodiesel market would require 13.9 million metric heaps of oil to produce 16 million KL biodiesel next year, from the estimated 11 million tons needed this year, he added.

Indonesia's greatest palm oil association GAPKI said a decrease in exports meant there would suffice basic materials to supply the B40 mandate for now.

But the industry would require to evaluate "which one would be better", GAPKI chairman Eddy Martono said, referring to the possibility a boost in exports would make supplying the domestic market less viable.

Indonesia's palm oil output is estimated to reach 54.4 million heaps in 2024, a 2.26% boost from in 2015, while exports are anticipated to decrease by 2.47% to 29.5 million loads as domestic usage rose, driven by biodiesel mandate.

The ministry had actually tested the biodiesel, blended with 40% of palm oil, on a train for the very first time earlier today, while preparing to test the B40 mix on farming machinery, power plants and in the shipping industry, it stated. (Reporting by Bernadette Christina and Dewi Kurniawati