Allowing less pure fuel into the country could shore up supply.  

Finance Minister Nicola Willis has asked fuel importers what specifications could be relaxed to make it easier for them to get more in.  

Waitomo Group Chief Executive Simon Parham says there could be a relaxing of the rules to allow more sulphur content in our diesel.  

He told Ryan Bridge that we only allow fuel with less than 10 parts per million sulphur content. 

Parham says the US allows 15 parts per million and Australia has relaxed to 50 parts per million.  

LISTEN ABOVE