Some drivers are taking drastic action. Battery-powered cars accounted for one in eight new models last month, compared with one in 10 in April.
The number of electric models purchased last month surged to 15,448, a 20pc jump on a month earlier. It was a 17.7pc increase compared with the same month in 2021.
The rise of electric vehicles is accelerating as carmakers battle supply shortages and ration parts, favouring electric cars. Car dealers reported their worst May trading in three decades, barring the same month in 2020 when showrooms were forced to close.
Overall car sales dropped 20.6pc, or by 32,000, in May to 124,000 compared with the same month year earlier figures by the Society of Motor Manufacturers and Traders (SMMT) revealed.
Mr Williams said he expected worse to come on fuel prices, with the average litre of petrol expected to climb above 180p this week and diesel to move further towards 190p.
Brent crude hit $120 per barrel on Monday morning amid doubts that increased output targets among major producers will help ease tight supply.
Limited refining capacity is adding to the pressure on the prices of refined products, while exchange rates also play a role as refined fuel is sold in US dollars.
Ireland, which lacks refining capacity, is considering ordering people to work from home under coronavirus lockdown-style emergency plans.
The Irish government discussed limiting car travel, cutting the speed limit on motorways and fuel rationing, as well as a stay at home order for non-essential workers.
Dublin lifted rules enforcing working from home in January this year but the government and state agencies discussed bringing back the rule during an emergency planning exercise.