The price we pay for fuel in South Africa is mainly a factor of the international oil price, the rand/dollar exchange rate and various taxes levied by Government.
Here’s a breakdown of the crude oil price in rand over four months, a year, five years, 10 years, 15 years and 20 years.
Four months from February 2017 to June 2017 (-17.49%)

One year (-3.21%)

Five years (-31.65%)

10 years (17.45%)

15 years (110.04%)

20 years (576.93%)

For more detail, visit IndexMundi.