How to Clean a Concrete Driveway & Remove Oil Stains

The car is sold, moved on, or replaced, and what’s left behind is a dark patch that wasn't there before. Months later, it’s still there, slightly duller than the surrounding concrete, no matter how many times a hose has been run over it. A driveway like this is one of the first things anyone notices, whether that’s a visitor, a neighbour, or a buyer looking round a property.

The good news is that most of it comes off. A clean concrete driveway is achievable with a methodical approach, using the right method for the right stain and starting gently before working up. Anyone weighing up concrete for driveways that resists staining from the outset might find that worth a look too.

Here is what actually works, stain by stain.

Common Types of Concrete Driveway Stains

The three stains you are most likely to be dealing with are oil and grease, rust, and general dirt with moss or algae. Each behaves differently once on concrete, which affects how you tackle it.

Oil and grease are the trickiest because concrete is so porous. According to Which?, this high porosity makes concrete the hardest surface type to clean, allowing stains to work their way deep into the surface, which is why a fresh spill that looks easy to wipe up can leave a shadow behind weeks later. Rust marks usually come from metal garden furniture, tools, or a car jack left in the same spot for too long, and they tend to sit closer to the surface than oil [1].

Dirt, moss, and algae build up over time in shaded or damp areas and are mostly surface issues rather than penetration issues. Stubborn black spots from lichen that thrives in moist conditions can be more resistant and may need repeat treatment.

The driveway needs different things depending on which of these you are dealing with:

• Oil and grease stains need to be absorbed first, then a degreaser is applied multiple times.
• Rust marks respond well to a rust-specific remover applied directly to the mark.
• Moss, algae, and dirt usually lift with a stiff brush, detergent, and a rinse.

How To Remove Oil Stains from Concrete

The most reliable approach to oil stains starts gently. If the spill is fresh, the first job is to stop it from spreading and soaking in further, so blot it with an absorbent material like cat litter or sawdust rather than wiping it across the surface.

For older stains, household products are worth trying before reaching for anything stronger. Squirting washing-up liquid into a bucket of warm water, pouring it onto the affected area, and scrubbing with a broom before rinsing thoroughly is a method some people swear by. Baking soda mixed into a paste and left on the stain for a few hours before scrubbing can also help draw oil out of the surface.

Why Oil Is So Hard to Shift Once It's Set In

Once oil has had time to soak into the concrete, it bonds with the material at a level a surface wipe cannot reach. A concrete-safe degreaser, applied as the manufacturer instructs and left to work before rinsing, is designed to break down oil that has penetrated rather than just sitting on the surface.

Stubborn or older stains rarely lift in one go. Repeating the treatment, sometimes two or three times over a few days, gradually draws more oil out with each application. If a small domestic patch is part of a wider project, our DIY concrete page covers what is involved in replacing a section rather than just how to clean it.

Pressure Washing Tips for Concrete Driveways

A pressure washer can help with general grime and can assist with oil and rust once the stain has already been treated, but it is not a stain remover on its own, and the wrong technique can do real damage to the surface. Getting the settings right matters more than the machine's power.

For concrete and brick, Which? recommends the following settings and technique:

• Use a 15-degree nozzle with a pressure setting of 2,500 to 3,000 PSI.
• Start with lower pressure and test a small area first.
• Work in a consistent sweeping motion, taking care around softer or damaged bricks.

Pressure washing is most useful as a finishing step, after a degreaser or detergent has already broken down the stain. Used that way, it rinses away loosened dirt and residue without forcing reliance on raw pressure to shift the mark itself [2].

What to Avoid When Cleaning Concrete

A few common habits cause more harm than the stain they are meant to fix, and it is worth knowing what they are before you start. The following three mistakes account for most avoidable damage:

• Going straight to the highest pressure setting without testing a small area first.
• Using undiluted bleach or strong acidic cleaners, which can etch the surface.
• Holding the lance too close can dislodge mortar and let weeds establish.

If a cleaned patch ends up looking lighter, rougher, or more porous than the rest of the driveway, one of these is usually the cause. At that point, the best fix is often a sealant over the whole drive to even out the appearance and protect it going forward.

Talk to the Team Before You Decide

A driveway covered in oil stains and old grime can feel like a lost cause, but most of it lifts with patience and the right order of steps. Once it is clean, sealing the surface protects against future spills and keeps the drive looking right for longer.

Wright Readymix has spent years supplying concrete for driveways and domestic projects across the South West and South Wales, and understands the wear that leads to these stains in the first place. If an existing driveway is past the point where cleaning helps, or a new one needs a mix built for durability, the team can talk through the options.

Get in touch to discuss your driveway concrete requirements or call 0117 958 2090 to speak to the team directly.

External Sources

[1] Which?, Danny Dougan, Best Patio Cleaners 2026: https://www.which.co.uk/reviews/patio-cleaners/article/best-patio-cleaners-a8cIA3O3krKQ

[2] Which?, Manca Virant, Common Mistakes To Avoid When Using a Pressure Washer: https://www.which.co.uk/news/article/common-mistakes-to-avoid-when-using-a-pressure-washer-a6q3O7U8gTit