Oil stains on concrete driveway...

[reddog1]

Muratic Acid (33%hydrocloric acid)

Scrub it with a plastic brush, then rinse with water.

Takes about 5 min, and is enviromentally sound.

oh, but then you will have one REALLY CLEAN spot on your driveway, and you will realize how dirty the rest of the driveway is. LOL

 

[Johnny]

Dry cement mix. Rub it in and sweep it across a couple times. I never tried it on rough concrete but on a smooth shop it works pretty good.

 

[inactive]

Brake Cleaner. Yea, not the most "green" solution out there.

It's always worked for me.

 

[Shootin 4 Fun]

Contact Mid American Chemical in OKC and ask them if they can sell you a quart of NP-9. Apply a little to the stain, let it set for awhile and wash away.

 

[Maverick21]

Parts washer solvent. Pour it on, scrub and dab with a shop rag.

 

[glockman25]

wouldnt it be illegal to wash it away?

 

[Danny Tanner]

Brake Cleaner. Yea, not the most "green" solution out there.

It's always worked for me.

It's what I use, too.

 

[ignerntbend]

The recurrent theme seems to be naptha. I don't even know what to say. That stain will continue to be there. You're stuck with it. Fortunatley, the stain doesn't compromise the structural integrity of the driveway.Get in there with a jackhammer, bust out the existing, and pour the whole thing over. BUT, Realize that another sister in law could show up in the future and recreate the whole problem. Never ending downward spiral. Just cut your losses and keep moving.

 

[nofearfactor]

I regularly flip alot of used cars and trucks just for something to do when I'm home so I'm usually always working on something over to the side on my side of the driveway, and I make alot of messes. And my wife hates messes. Ive been using this concrete and driveway concentrated cleaner that comes in a gallon container made by Rubbermaid, think I got it at WalMart or somewhere. Works pretty good. And keeps me out of trouble.

 

[Fyrtwuck]

Power wash it and let it dry. Then paint the whole driveway black and never worry about it again. The neighbors will think you asphalted your driveway.