Diesel is soaring past four dollars a litre. 

Z has issued a national price advisory for commercial customers showing the price of diesel jumping 55 cents a litre, putting the price at the pump at $4.16. 

It says prices are based on what it'll cost to buy the next shipment from overseas, not what's already sitting in tanks.  

Waitomo CEO Simon Parham told Mike Hosking it looks like the price will filter through to all importers across New Zealand. 

He says oil was trading at about $80 a barrel pre-conflict, which has now soared to about $255 a barrel. 

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