Oil Stains on a Concrete Driveway
Concrete is porous. Oil does not sit on the surface waiting to be rinsed off — it wicks down into the slab, which is why a pressure washer alone almost never clears a real oil stain.
Why oil stains resist normal washing
An untreated concrete driveway has an open pore structure that behaves like a sponge. Motor oil, transmission fluid and hydraulic fluid penetrate within minutes and continue migrating downward for days.
Pressure alone only cleans the top layer of the slab. The oil below stays put and gradually wicks back to the surface, which is why a driveway can look clean after washing and shadowy again a week later.
Removing it requires a degreaser that emulsifies the oil and pulls it back up out of the pores, followed by hot rinsing and surface cleaning to lift the released residue.
What determines whether it comes out
Age. A fresh spill treated within days usually comes out completely. A stain that has been baking into the slab for years may only lighten.
Sun exposure. Florida heat drives oil deeper and faster than it would in a cooler climate. A driveway in full afternoon sun is a harder job than a shaded one.
Sealed or unsealed. A sealed driveway holds the spill near the surface and cleans up far more completely. Unsealed concrete is the difficult case.
What was spilled. Motor oil and grease respond well. Transmission fluid, brake fluid and some hydraulic oils stain more stubbornly and can leave a permanent shadow.
What not to do
Do not pour bleach on it. Bleach does nothing to oil. It will lighten the surrounding concrete instead, making the stain more obvious by contrast.
Do not use a turbo nozzle on the spot. Concentrated pressure etches concrete, leaving a permanent scarred ring that is worse than the stain and cannot be undone.
Do not put kitty litter on an old stain. Absorbents work on a fresh spill still sitting wet. On a stain that has already penetrated, they accomplish nothing.
How we treat it
We apply a commercial degreaser and give it real dwell time to break the oil's bond with the concrete — the step most DIY attempts skip.
The slab is then cleaned with a surface cleaner, which delivers even pressure across the whole area rather than the wand stripes you get freehand. That matters: a driveway cleaned freehand shows arcs in the concrete for years.
We are straight with you about outcome before we start. Most oil stains lift substantially, many disappear, and some old deep ones only fade. We will tell you which yours is likely to be rather than promise a result the slab cannot give.
Questions we get about this
Can every oil stain be removed completely?
Will cleaning leave stripes on my driveway?
Should I seal the driveway afterward?
How long does a driveway take?
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