Connecticut-based Blue Fin Tankers has become the third shipowner to accuse refiner Valero of passing off bad fuel.

The Heidmar pool is suing the San Antonio-based company, accusing it of knowingly delivering the 150,000-dwt Astra (built 2002) with more than $500,000-worth of off-spec bunker fuel in March 2018.

Blue Fin claims the case involves bunkers that Valero would not even put in its own ships.