Every first Wednesday of every month the fuel price goes up, occasionally coming down. Fuel prices has gone up by 25% in any given month - to give you an idea of possible inflation. Petrol basically used to cost about US$ 0,40/l ; now costing US$ 1,22/l. But in ZAR the fuel price currently (1st week June 2008) stands at R9,83/L. (1 US$ = ZAR 7,66) On 2 May 2007 it was at R7,01/L. (1 US$ was then ZAR 7,03) In  June 1999 the price was R2,23/l.
That is equal to an average of 17,5 % + increase year on year! This is the minimum real inflation, not the 10% the government claims! If inflation was actually 10%, why are foods and goods going up by increases of up to 30% at a time??
Zimbabwe is now cheaper than SA if you can get it as they get it from us and are not paying atrocious levies - it is a battle to get both diesel and petrol though. Zambia is about 10% more than SA. Botswana is cheaper & Swaziland about R1/liter cheaper as well.

Look at http://www.dme.gov.za/energy/liquid_prices.stm , and you will see the basic fuel price is R5,78/L of R9,33/L, or 60% of the streetprice. The rest are taxes, levies, margins and delivery. The tax is R1,27/L and customs 0,04/L, 14% of the user end price.

Also look at Inflation