All options are on the table for conserving fuel if the US-Israel war on Iran continues.

Iran's retaliating with hits on neighbouring countries, and blocking shipping transit through the Strait of Hormuz - sending global fuel prices spiking.

Associate Energy Minister Shane Jones says the Government's working on a plan in case our supplies come under threat.

Jones says we have 50 days fuel here and on the way, but continued supply rests on the length of the conflict.

"Kiwis expect their Government to be proactive, Kiwis expect us to deal with the fact that other countries are hoarding their fuel."

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