Fuel policy, kilometre caps and what the N3 costs
Three clauses decide the running cost of a hire: how you return the tank, how many kilometres you may do, and how much the road itself charges. None of them is on the first page of the quote.

A technician checking fluid levels under an open bonnet on a workshop ramp.
Full to full, and the refuelling fee
The cleanest fuel policy is full to full: the car leaves with a full tank, you bring it back full, and nobody charges anybody anything. Check the gauge and the handover sheet agree before you drive off, because a tank recorded as full that is actually three-quarters is a R400 gift to the next renter at your expense. Keep the final fuel slip from the filling station nearest the drop-off; it is the only proof you have, and a slip from a garage forty kilometres away invites an argument about what you burned in between.
The alternative, prepaid or a service charge, is where the money leaks. Prepaid tanks are sold at a rate above pump price and you are not refunded for what you do not use, so returning a hire half full means you donated half a tank. The refuelling or service fee applied when you bring a car back short usually runs R250 to R450 on top of the fuel itself, charged at an inflated rate per litre. On a R21-a-litre coastal pump price, a 55-litre tank costs about R1 155 to fill; letting the company do it can land closer to R1 700.
Unlimited is rarely unlimited
Most hires out of Durban come with a daily allowance, commonly 200 kilometres a day pooled across the rental, and excess kilometres billed at something like R1.80 to R3.50 each. That sounds generous until you look at a real trip. Durban to the northern Berg and back is roughly 700 kilometres before you have driven anywhere once you get there. Add a morning run across to Giant's Castle and an afternoon down to Winterton, and you are through your allowance on a four-day weekend.
Genuinely unlimited packages exist, usually on longer hires and usually at a higher daily rate, and they often come with a geographic restriction instead: unlimited within South Africa, or unlimited but not across a border. Work out your route distance before you book and compare the two structures honestly. For a Midlands weekend of 400 kilometres the capped rate is cheaper. For a fortnight that includes the Garden Route run down the N2, which is about 1 300 kilometres each way from here, the unlimited package is not a luxury.
The plazas between here and the Free State
The N3 up from Durban is a toll road with physical plazas, not an electronic system, so you pay as you go and you need either cards that work or cash. In a light vehicle the run from Durban to the Gauteng side comes to somewhere around R250 to R300 one way at current tariffs, spread across Mariannhill shortly after you leave, then the plazas past Pietermaritzburg and Mooi River, and the big one before the climb up Van Reenen. Keep the slips if you intend to claim the trip back from anybody.
Avoiding the tolls is possible and usually a false economy. The old road through the Midlands towns is slower, carries heavy traffic through built-up stretches, and in wet weather the surface is patchy enough to put your tyre liability at risk. We would pay the R280 and keep the windscreen. The one exception is a short hop to Hillcrest or Camperdown, where coming off before Mariannhill genuinely saves a few rand and costs you nothing in time.
Attendants, cards and load-shedding
Nobody pumps their own petrol in South Africa, which visitors find charming for about two days. An attendant will fill, check your oil and water if you ask, and clean the windscreen, and a tip of R5 to R10 is normal, more if they have done something properly. Keep small notes in the door bin, because fumbling for coins while the car behind you waits is how people drive off with the nozzle still in. In a hired car, that is a fuel-flap claim nobody wants to explain.
Load-shedding is the practical complication. A filling station without a generator cannot pump, and on a stage-heavy evening you can pass three dark forecourts in a row on Umgeni Road. The rule we live by in a hire is simple: refuel at half a tank rather than a quarter, and do it in the morning. The same logic applies to the garage at your accommodation. If the gate motor and the garage door are both on municipal power and the schedule hits at six in the evening, you want to know where the manual release is before you arrive in the dark with a strange car.
Working out the real cost per kilometre
Add it up properly once and the week makes sense. Take the day rate times the days, add the cover tier you chose, add the airport premium if any, add fuel at roughly 7.5 litres per hundred kilometres for a mid-size automatic at coastal pump prices, add the tolls both ways, add the excess kilometre charges you expect to exceed, then divide by the distance you will actually drive. On a Berg long weekend of 800 kilometres, a typical honest total lands between R5 500 and R7 500, and almost none of that is the headline figure you booked on.
Do the same arithmetic against taking your own car and you will sometimes be surprised. For a single long run with four people and luggage, hiring a comfortable automatic and leaving your own eleven-year-old car in the garage can cost less than the depreciation, tyres and risk of the trip, particularly if your own vehicle is out of warranty and the route includes Van Reenen in summer. We have argued this both ways at the same table and the answer genuinely depends on the car in your garage.
Three things to take away
- Full to full is the only fuel policy that cannot cost you money; keep the slip from the garage nearest the drop-off.
- Measure your route before choosing between a 200-kilometre daily cap and an unlimited package.
- Refuel at half a tank in a hired car, in the morning, because dark forecourts are a scheduling problem not a fuel problem.
