First few minutes
Just happened? Do this first
- Blot up wet oil with a clean, dry white cloth or paper towels, and don't rub, since rubbing spreads the stain.
- Keep heat away from the spot, including hot air, until the stain is gone, because heat sets stains.
- Work from the edge of the stain toward the center so the oil doesn't spread.
Oil on siding is a fat-based stain, and fats and oils don't dissolve in water, which is why a plain hose-down won't lift it. The gentle approach is a sudsy detergent wash, and a stronger wash only comes into play when the mark refuses to budge. Fresh oil comes up much more readily than oil that has settled for weeks, and an old stain can take several treatments.
Fresh grease on vinyl siding is usually the easy one to shift. Oil-based deck stain that has dried on needs more patience, and a few more rounds of the sudsy wash are worth trying before you give up. If it still shows after that, a pro is the next call.
Before you start
What siding, roof & exterior can take
Safe to use2
- Water
- Oxygen bleach
Use with care5
- Soaking
- Chlorine bleach
- Solvents (alcohol, spot removers)
- Acids (vinegar, lemon)
- Scrubbing and abrasives
7 items
What you'll need
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- Plain dishwashing detergentMakes the foam for the first wipe. (opens Amazon)
- Hot water in a bucketHelps the detergent whip up and loosens the oil. (opens Amazon)
- Soft clothsHold the foam and wipe without roughing up the siding. (opens Amazon)
- Clean, dry white cloths or paper towelsBlot up the wet oil without spreading it. (opens Amazon)
- Clear water and a clean clothRinse away the suds.
- Laundry detergentMakes a strong solution for fresh or stubborn stains. (opens Amazon)
- Stiff brushScrubs the laundry detergent solution into the stain. (opens Amazon)
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6 steps
Step by step
Step 1 of 6
Test a hidden spot first
Once the wet oil is blotted up, dab your cleaner on a hidden spot of the siding, such as the underside of a panel. Wait, then look at the cloth and the siding before you go further.
Careful. Stop if color transfers or changes during the test.
Step 2 of 6
Whip up a sudsy bath
Mix dishwashing detergent into hot water and swish until you have a great volume of suds. You want a thick foam on top, because the foam is what you'll wipe with.
Step 3 of 6
Wipe with the foam only
Dip a cloth in only the foam, leaving the liquid behind, and wipe the stain gently. Work in small sections so the suds stay on the stain while you wipe.
Tip. Switch to a clean cloth when the first one picks up dirty oil, so you aren't spreading it around.
Step 4 of 6
Rinse with clear water
Wipe the area with a clean cloth moistened in clear water until no suds or slick film is left. Dry the spot and check it before moving on.
Careful. Don't let cleaners or soap dry on the siding.
Step 5 of 6
Scrub a fresh or stubborn stain
For a fresh stain, or one the foam didn't lift, make a strong solution of laundry detergent and hot water. Scrub the stain with a stiff brush, rinse well, and dry the siding.
Tip. Use short strokes rather than hard pressure so the vinyl stays smooth.
Step 6 of 6
Check the siding in daylight
Look at the spot in good light and compare it to the siding around it. If a dark or greasy shadow remains, repeat the foam wipe and the rinse.
If you'd rather buy than mix
Best products for oil on siding, roof & exterior
Use a plain dishwashing liquid for the foam and a plain laundry detergent for the stronger solution. Skip any product labeled as a grease remover or solvent for this siding.
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 siding, roof & exterior, 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 stain is gone when the spot matches the color and gloss of the surrounding siding and a damp cloth wiped across it comes away clean. A faint shadow in daylight means the foam wipe needs one more round, not a stronger cleaner.
What changes for yours
Adjust for your siding, roof & exterior
Fresh oil on vinyl or aluminum siding
Fresh oil lifts most easily, so start with the blot and the dish soap foam right away. Keep the wipe light and work in small areas so the oil doesn't spread across the panel.
If the spot still shows after one rinse, move to the laundry detergent scrub rather than reaching for stronger cleaners.
Oil-based deck stain
Grease and deck stain respond to the same foam wipe and rinse, but the thick residue usually needs a second round. Follow up with the laundry detergent scrub on the heavy part of the spot.
Don't reach for mineral spirits or paint thinner to speed things up, because vinyl can't take organic solvents. Repeat the scrub until the spot matches the siding around it.
Wood siding
Wood siding takes the same dish soap foam, applied with a cloth and only the suds. Rinse with clear water and let the wood dry before judging the spot.
Leave out steel wool and wire brushes on wood boards, because leftover iron reacts with the wood and stains it. If the mark stays, repeat the foam wipe rather than reaching for harsher tools.
Fiber cement siding
Fiber cement siding can take the dish soap foam, but it needs a gentle hand. Skip high-pressure power washers, bleach, acid, hard metal brushes and abrasive sponges, since they can damage the surface and the finish.
Wipe with a soft cloth and the foam, rinse with clear water, and repeat rather than scrubbing harder.
Brick, concrete, or stone siding
Masonry siding holds oil differently, so the vinyl steps don't carry over. The Concrete, Brick & Driveways guide covers the masonry method, which mixes 1 part Trisodium Phosphate with 6 parts water and lets it soak 15-20 minutes before scrubbing.
For natural stone, the Marble & Natural Stone guide is the better match.
Old, dried or set-in stains
Old oil that has been sitting on the siding is harder to lift than fresh oil, so expect to repeat the steps. Keep the same dish soap foam and rinse cycle, and give each round time to work before judging the spot.
Once the oil has dried, the foam may only soften it, so the laundry detergent scrub does more of the work. Use the stiff brush in short strokes and rinse well after each pass.
If a shadow still shows after several rounds, stop rather than reaching for solvent, because vinyl can't take it. A faint mark that only shows up close is a realistic finish for old oil, and it's better than damaging the siding.
Vinegar, baking soda, peroxide and more
Do home remedies work on oil on siding, roof & exterior?
Most household remedies don't belong on vinyl siding for this stain. Whipped dishwashing suds lift the oil by themselves, so leave the other remedies on the shelf.
Works1Skip4Avoid1
What makes it worse
Mistakes to avoid
Don't use solvents or harsh cleaners on vinyl
Organic-solvent cleaners, undiluted chlorine bleach, liquid grease remover, nail polish remover and furniture polish can all damage vinyl siding. Stick with the dish soap foam and the laundry detergent solution instead.
Don't aim the pressure washer upward
If you rinse with a pressure washer, aim the spray downward so the water runs off the siding. An upward spray can damage the surface.
Don't mix bleach with ammonia
Ammonia-based cleaners and chlorine bleach release toxic fumes when combined. If you've used both on the same area, rinse each one out with plain water before moving to the next.
When to call a professional
If the stain is still visible after several rounds of the foam wipe and the laundry detergent scrub, a professional exterior cleaner can take a look. Call one sooner if the siding is cracked or the finish is worn, because cleaning can make that damage worse.
Questions
Can dish soap remove oil from vinyl siding?
Yes, for most fresh oil spots. Whip dishwashing detergent into hot water, wipe with only the foam, and rinse with clear water. Repeat the wipe if a faint mark remains.
What removes grease stains from vinyl siding?
The same dish soap foam works first, followed by a rinse. For a stubborn or fresh stain, use a strong laundry detergent solution in hot water, scrub with a stiff brush, and rinse well.
Can I use mineral spirits or paint thinner on vinyl siding?
No. Organic solvents aren't safe for vinyl siding, so skip mineral spirits, paint thinner and alcohol. Stick to the detergent steps, which are gentler on the surface.
Will oil-based deck stain come off vinyl siding?
It can, but old or dried deck stain takes more rounds than fresh oil. Repeat the foam wipe and rinse, then use the laundry detergent scrub on the thick part. Keep solvent out of the process, since vinyl can't take it.
Is bleach safe to use on oil stains on siding?
Not undiluted chlorine bleach on vinyl siding. The detergent steps handle oil without it, so there's no need to reach for it.
Can I pressure wash oil off vinyl siding?
You can rinse with a pressure washer if you keep the spray aimed downward, never upward. Do the foam wipe first so the detergent does the lifting, then rinse.
How long should the foam sit on the siding?
There's no set time for vinyl, so keep the foam wet only while you wipe. Rinse with clear water as soon as the spot is worked, and repeat the wipe rather than letting soap sit and dry.
Oil on other materials
Other stains on siding, roof & exterior
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.