The national refinery will pay 44 million colons, about $89,000, to 26 owners of motor vehicles that suffered damage because the company put an excessive amount of additive into the fuel.
That was the announcement Thursday by the Autoridad Reguladora de Servicios Públicos, which arbitrated the cases.
The additive is methylcyclopentadienyl manganese tricarbonyl, known as MMT.
The problem developed last August. The agency said that 176 complaints were received and that many are still being processed.
The Autoridad has been receiving from two to eight complaints a week over the matter. The Refinadora Costarricense de Petróleo appeared to have added too much of the chemical.