First few minutes
Just happened? Do this first
- Blot the oil with a clean, dry white cloth or paper towels, and don't rub.
- Pretest any cleaner on a hidden board, and stop if color transfers.
- Keep heat off the spot: no dryer, iron or hot air until the stain is gone.
Oil on a deck is a greasy mark on the boards, and the wood or composite underneath decides how it behaves. Fresh oil lifts most easily, while older or dried marks may need repeated passes. Composite boards, teak, pressure-treated wood and painted decks each have their own notes, so test somewhere out of sight first.
Match your method to the board, since getting oil stains out of composite decking takes a different approach than teak or wood. Keep the scrubbing light until you see how the surface reacts. If the mark is still there after a few rounds, go back to the foam wipe and keep it gentle.
Before you start
What decks & wood fences can take
Safe to use2
- Water
- Oxygen bleach
Use with care5
- Soaking
- Chlorine bleach
- Solvents (alcohol, spot removers)
- Acids (vinegar, lemon)
- Scrubbing and abrasives
4 items
What you'll need
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- Dishwashing detergentMakes the foam that lifts the oil off the boards. (opens Amazon)
- Hot water in a bucketHelps the detergent whip up into a thick foam. (opens Amazon)
- Clean, dry white cloths or paper towelsBlot the oil and show whether any color is transferring. (opens Amazon)
- Garden hose with a low-pressure sprayThe recommended rinse for the boards.
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5 steps
Step by step
Step 1 of 5
Blot up the excess oil
Press a clean, dry white cloth or paper towel onto the oil to take up as much as you can. Work from the outside edge toward the middle, and switch to a fresh section of cloth as it fills.
Careful. Don't rub the oil in, because rubbing spreads the stain and can damage the fibers.
Step 2 of 5
Pretest on a hidden board
Test the foam on a hidden spot, such as the underside of a board or along an edge. Check the spot for color transfer or change before you wipe the stain itself.
Tip. Keep heat off the spot while you work, because heat sets stains.
Step 3 of 5
Whip up the detergent foam
Mix dishwashing detergent into hot water and swish it until it makes a large volume of suds. Use only the foam for the cleaning step, not the liquid.
Step 4 of 5
Wipe gently along the grain
Dip a clean cloth into only the foam and wipe the stain gently, moving along the grain of the wood. Work in small sections so the foam doesn't dry out on the boards while you go.
Careful. Don't let cleaners or soap dry on the deck.
Step 5 of 5
Rinse with clear water
Rinse the spot with a clean cloth dampened with clear water, then go over the area with low-pressure hose spray. Let the boards dry before you judge the result.
If you'd rather buy than mix
Best products for oil on decks & wood fences
Plain liquid dishwashing detergent is the only product this method needs, so you don't need a special deck cleaner for the foam.
Amazon Basics Microfiber Cleaning Cloths
How we picked these: each product is made for this type of stain, its maker doesn't warn against using it on decks & wood fences, and its directions fit the steps above.
Finished the steps? How does it look?
Nice work. Let it dry completely and check it again in good light. Here is what done looks like:
How to tell it's really gone →A faint mark usually needs one more round, not a stronger product.
If the stain was already dried or set, the method changes.
Old, dried or set-in stains →When to call a professional →How to tell it's working
The oil should lift onto the cloth as you wipe, and the foam should turn cloudy or dark as it picks up the oil. When the cloth comes away clean and the boards look even after rinsing, the spot is gone. If the cloth keeps picking up dark oil, go around once more with the foam and rinse.
What changes for yours
Adjust for your decks & wood fences
Grease on Trex and composite decking
Composite boards take the same detergent foam as wood, so start there and keep the cloth damp rather than soaked. Stay with light, even wipes so the surface doesn't get scuffed.
Because composite finishes vary, test the foam on a hidden board first and stop if the surface looks dull or the color shifts. If the grease stays, check the manufacturer's care guide before trying anything stronger.
Oil on Trex and composite decking
Oil on composite is handled the same way: blot first, then the foam wipe and clear-water rinse. The only real difference is caution with the finish, so keep every product as gentle as the foam.
If the oil doesn't lift after a couple of rounds, check the manufacturer's care guide before trying a stronger product of any kind.
Oil and grease on teak wood
Teak has no special method, so use the closest approach: the same foam wipe, tested on a hidden spot first. Keep the wipes light, since heavy scrubbing can roughen the wood.
Rinse fully with clear water, then let the wood dry before you judge the result. If the stain still shows, repeat the foam round rather than reaching for a stronger product.
Grease on pressure-treated wood deck boards
Pressure-treated boards take the same blot, foam wipe and clear-water rinse as other wood, and they should be wiped along the grain. Keep the cloth moving and don't press hard on the surface.
If the stain is stubborn, repeat the foam round and rinse instead of reaching for a stronger product. Rinse each section before moving on so no residue is left behind.
Grease on a painted deck
Painted boards need a gentler touch, so do the pretest on a hidden spot before anything else. Use the foam only, keep the cloth just damp, and rinse with clear water.
If the paint softens, lifts, or the color moves onto the cloth, stop and let the boards dry. Grease marks that stay can be lightened with another light round, but a painted surface may need repainting rather than more cleaning.
Old, dried or set-in stains
Old oil is harder to lift than fresh oil, because it has had time to soak into the wood or composite. If the stain has been there a while, expect the first round to only lighten it.
Dried oil needs more rounds rather than a stronger product. Repeat the foam wipe and clear-water rinse, and let the boards dry fully between passes so you can see what's left.
If it's still there after several rounds, stop and don't escalate with solvents or bleach on the boards. Plan on some lightening rather than total removal, and call a professional if the mark stays.
Vinegar, baking soda, peroxide and more
Do home remedies work on oil on decks & wood fences?
Most kitchen remedies you'll find online are aimed at fabric or countertops, so many don't belong in a deck method. Detergent foam is all the boards need for oil. Most kitchen remedies do little for oil on a deck.
Works1Skip5
What makes it worse
Mistakes to avoid
Don't use steel wool or wire brushes
Exterior wood boards can stain from the iron left in steel wool or wire bristles. Stick with a clean cloth and the foam, which lifts the oil without leaving marks behind.
Don't use tornado pressure-washer tips
Narrow-stream and rotating tips can gouge the boards and do far more harm than the oil. Use low-pressure hose spray for rinsing instead.
Don't scrub with caustic cleaners
Aggressive scrubbing with caustic cleaners, or power washing soft woods like western redcedar, can wear away the wood surface. Keep the method gentle and let the foam do the work.
Don't bleach pressure-treated boards
Chlorine bleach breaks down the lignin in pressure-treated wood, corrodes metal fasteners and harms nearby plants. It also doesn't kill mildew spores, so it won't solve the problem either.
When to call a professional
Call a professional deck cleaner if the stain stays after several rounds, or if you can't tell what the boards are treated with. If the deck is old and may be CCA-treated, don't cut or burn the lumber, because its sawdust and smoke contain arsenic. Pressure washing is a job for someone experienced, since a deck can be damaged in the wrong hands.
Questions
Does dish soap remove oil from a deck?
Yes, a detergent foam is the cleaner used in this method, and it works best on fresh oil. Mix it into hot water, wipe with the foam only, and rinse with clear water. Pretest on a hidden board first.
Can old oil stains on a deck be removed?
Often only partly, so expect lightening rather than full removal. Repeat the foam wipe and rinse, letting the boards dry between rounds. If the mark still shows after several rounds, a professional is the next step.
Does white vinegar work on deck grease?
No, it isn't needed for deck grease. Use detergent foam and a clear-water rinse on the boards. Stick with the detergent foam and clear-water rinse for grease on the boards.
Is oil on a Trex deck handled differently?
The first steps are the same: blot, pretest, foam wipe, and rinse. Composite finishes vary, so check the manufacturer's care guide before trying anything beyond these steps.
Can I use the same method on a painted deck?
Yes, with a lighter touch. Use the foam only, keep the cloth damp, and stop if the paint softens or lifts.
Is there a special method for teak decking?
For teak, start with the foam wipe on a hidden spot. Keep the wipes light, rinse with clear water, and let the wood dry before you judge the result.
Oil on other materials
Other stains on decks & wood fences
Start from the bigger picture
How we know this
Every method, amount and warning here comes from university extension services, industry bodies and product makers. We read them, check every step for unsafe combinations and changed amounts, and write it up so you can follow it.