When one Cork petrol station dropped their prices for both diesel and petrol to €1.99 a litre, word got out quickly and queues started forming outside as hard-pressed motorists flocked to fill up.
The Swift 24/7 Station in Rathcormac has been pinpointed on social media as the cheapest petrol station in Cork.
Such is the bewildering speed of price changes, with stations across Ireland putting up prices, bringing them down and then hiking them up again, that local petrol price watch Facebook Groups like Petrol Prices Cork are being used to alert hard-pressed motorists to any stations offering a break.