The most common contaminant is water, but that is easily fixed - the oil just needs to sit for a few days, he says.
In this case, it's more likely the contaminant is sulphur or something else, which will require dilution - and the material for that will be on a ship somewhere.
Read more:https://www.sunlive.co.nz/news/308535-airlines-told-to-conserve-fuel-after-contamination.html