Winston Peters was doing his best to quell concerns there were ructions in the coalition, claiming the government was as stable as a "three-legged stool".

Prime Minister Christopher Luxon has blamed leaks about his leadership on a "small handful of dissatisfied MPs" and says he will address the matter with his caucus at a meeting tomorrow.

BusinessNZ has made its case to ministers as to why the food and grocery sector should be put in the highest priority level of any fuel rationing framework.

The government has fleshed out its National Fuel Plan, outlining rationing measures that would be taken if supplies start running dry.

The Green Party is crying foul after the government admitted more than half of families in material hardship will not benefit from its fuel support package.

National has slipped further behind Labour in the latest RNZ-Reid Research poll, falling to 30.8% support.