** Ampol ALD.AX shares rise as much as 4.9% to A$30.85, their biggest intraday pct jump since March 5
** Among top gainers on broader benchmark S&P/ASX 200 .AXJO, which is down 1.5%
** Australia Energy Minister Chris Bowen said country would temporarily amend fuel quality standards to assist in supply
** Says will allow around 100 million litres per month of new petrol for domestic supply
** Adds, Ampol to ensure priority for regions of shortage, wholesale spot market supporting independent distributors and harvesters
** Competition regulator said on Wednesday it will seek explanations from fuel retailers on pricing during Mideast crisis
** Around 1.4 million Ampol shares traded so far vs 30-day average of 1.1 million
** YTD, stock down 4.1% YTD vs AXJO's 1.2% fall
(Reporting by Nikita Maria Jino in Bengaluru)
((Nikita.Jino@thomsonreuters.com;))