Oil stains on the driveway: what lifts and what will not
Fresh oil comes out. Spilled this month, pre-treated with a degreaser and lifted with hot-water pressure, it usually disappears. Oil that has sat for years has soaked into the concrete itself — that shadow fades to match the slab, but it will not vanish. A proper clean means pre-treat, hot pressure, then a rotary surface cleaner for an even finish. Most Sydney driveways run $180-$420.
Oil does not sit on concrete — it moves in
Dirt sits on top of concrete. Oil does not. Concrete is porous — a network of tiny capillaries — and engine oil wicks into it the way water moves into a sponge, only slower. Give it a hot Sydney summer and the sun bakes the residue as it travels. So an oil stain is not one problem. It is two: the film on the surface, and the oil that has already moved below it. The first responds to cleaning. The second responds partially.
This is why the internet hacks disappoint. Cat litter, cola, dish soap and a stiff brush — they all work on the same layer, the surface film, and only if the spill is recent. None of them reach what has soaked in. They are not wrong, exactly. They are just fighting the part of the stain that was always going to come off, and leaving the part that was not.
Fresh spills lift almost completely
If the spill happened in the last few weeks, the odds are good. Most of the oil is still in that top film, and the right sequence takes it out: a proper degreaser applied first and given time to break the oil down, then hot-water pressure to lift it, then a rinse. Done in that order, a fresh spill usually comes out completely — or close enough that you will not find it again without a torch and a grudge.
Heat is the step most driveway jobs skip. Cold water at high pressure mostly redistributes oil — it thins the film and spreads it around. Hot water changes the oil's viscosity and lets the degreaser finish its work, so the oil releases instead of smearing. It is the difference between washing a roasting pan in cold water and hot. Same pan, same soap, very different result.
The old shadow fades to match — it does not vanish
Now the honest part. A stain that has been there for years is no longer on your driveway — it is in it. The oil has migrated millimetres down into the slab, and no surface treatment reaches that without removing concrete. Cleaning takes off everything above the surface line and pulls some of what sits just beneath. The shadow lightens, sometimes dramatically. It does not disappear.
Anyone promising full removal of a baked-in stain is planning either to grind your concrete or to disappoint you. What a good clean actually delivers is a fade — the shadow drops back to a faint tone-on-tone mark on a uniformly clean slab, and the eye stops snagging on it. On most driveways that is the difference between a stain guests notice and one you have to point out. That is the ceiling, and it is usually enough.
The even finish is the actual trick
Here is the trap with spot treatment: clean one stain on a driveway that has not been washed in three years and you trade an oil patch for a bright halo. The patch was grey-on-grey; the halo is clean-on-dirty, and it is worse. The fix is to clean the whole slab to the same standard in the same visit, which is what a rotary surface cleaner does — an even, stripe-free finish edge to edge, rather than the wand-swirl patterns a hand lance leaves behind.
That even finish is also what makes the faded shadow work. A soft mark on a uniformly clean surface reads as texture. The same mark next to patchy grime reads as a stain. And if the driveway sees regular drips — a car that marks its territory — sealing after the clean is worth considering. It is a set add-on with us, and sealed concrete gives the next spill far less to soak into.
What it costs, and getting your number
Driveway and path pressure cleaning starts at $180, and most Sydney driveways land between $180 and $420 depending on area. That covers the pre-treatment on oil, the hot-water lift and the surface-cleaner finish — not a quick wand pass. Sealing, if you want it, is priced as a set add-on on top, and bundling the driveway with other exterior work on the same visit saves 5-15%.
You do not need someone standing on your driveway squinting at the stain to price it. The instant quote asks about the area, returns a firm, bookable price in about 60 seconds, and the number holds unless the place is materially different from what you described. Punch it in, see your figure, and decide whether the shadow has overstayed its welcome.