Rinse the tiles with clean water and a soft cloth to ensure you remove all traces of vinegar.
How to remove oil stains from floor tiles.
Sprinkle some baking soda or cornstarch on the stain.
Mop up the areas where you applied the washing soda solution removing the dissolved grease stains on the tile floor.
When that s done rinse the floor with clean water.
Mix it gently with the water and let the paste sit for a few minutes to react.
Steps to remove the oil.
Using the 10 to one ratio for disinfecting fill a bucket with one cup of bleach and ten cups of hot water and mix the solution thoroughly.
Let the baking soda or cornstarch sit on the stain for 20 minutes so that it helps break down the oil.
Alcohol is most likely to be effective against dyes while acetone is best for oil based stains and paints.
Clean gently with a soft liquid cleanser with bleach or household detergent or ammonia or mineral spirits or acetone.
Scrub scouring powder into liquid floor stains to lift them.
Once oil stains sink into unsealed tile they can be very difficult to remove.
Instead handle laminate stain removal for items such as ink dye cigarette marks and wine that won t come out with a gentler cleaner by rubbing them with a soft cloth moistened with acetone or rubbing alcohol.
An oil based stain will darken the stone and normally must be chemically dissolved so the source of the stain can be flushed or rinsed away.
Spray the tile surface with the solution and wipe with a sponge or soft nylon pad.
Spray a small amount of brake cleaner onto a hidden area of the tile to look for any adverse reaction first.
You may also try some grout cleaner from the building supply store.
Then wipe the stain with an abrasive sponge or a rag.
Wet the stain slightly with water then sprinkle enough scouring powder onto the floor tile stain to completely cover it.
To test it spray it on the surface let it sit for a minute then wash it off a soapy damp cloth.
If the stain won t rub off wet a rag with the acid solution and lay it over the stain for 10 minutes.
3 sprinkle the stained area with some.
Pour the diluted bleach over the stain or you can also put the solution in a spray bottle and spray it on the tile.
Wipe the area with a towel cloths or paper towels.
If the stains are not deep maybe some dawn detergent may be enough.
Pat the area dry then inspect it for any damage or discoloration.
Soak a mop in the bucket and wring out the water.
Test a small area in an inconspicuous area with some tsp bleach and water mixture.
I don t know what you have already tried to remove the oil stains.