Prices checked 3 min ago with SA Fuel Pricing Information Scheme (Fri, 6 Nov, 5:35 pm ACDT)
The cheapest Premium Diesel near Heathfield right now is 279.9c at AMPM Stirling. The average across 3 servos within 6 km is 281.2c, and the gap
between cheapest and dearest is
4.0c a litre, about $2.00 on a 50-litre fill.