At current exchange rates.
My current diesel (Korea): 1,790 KRW/L →
≈ R21.90/L
National average diesel (Korea, early Oct): ~1,843 KRW/L →
≈ R22.70/L
Pre-Iran war (my experience, what I remember paying around January 2026): ~1,600 KRW/L →
≈ R19.70/L
Peak during the war, at least what I remember paying: ~2,100 KRW/L →
≈ R25.80/L
Some streetview screenshots to back up the trend, from my local petrol station:
First image. Long before Iran war, middle price on the sign is DIESEL per litre in KRW.
View attachment 1944567
May 2026, pretty steep, deep in the war, although still less than the 2000+ krw per litre I experienced at some point.
View attachment 1944568
July 2026 - still decreasing.
I filled up 2 weeks ago and paid 1790won per litre. Still up, from pre-Iran war, but much closer to pre Iran War levels, compared to the max I paid few months ago.
Also worth noting, the ZAR - USD exchange rate, the RAND is doing pretty well against the USD, so if anything, it should work in your favour.
Korean currency is quite weak at the moment against the USD, at least compared to what it was a year ago, so in theory it could be even cheaper if it wasn't for that.