kingcole
Well-known member
dont know the answers but some factors could be that diesel cost more to refine, odd but true. i think it might be that it cost more to refine the low sulfur stuff required for road use. also there maybe refinary issues with how much capacity is available for diesel vs petrol right now. theres also more tax on diesel, which accounts for higher price though not the amount it can change.
Diesel is actually a lot cheaper to refine, there is just not as many refineries for diesel, so there is a supply and demand issue.
Over the past 10 years we have gone from having about 15% of our cars running on diesel to about 60% now, and it's still rising.
More diesel refineries re planned, but until they come online the price may get wider