This is a weird one for you... my roommate brought home some breadsticks that were drenched in garlic "butter" (presumably not real butter, I don't know...) that sloshed all over the passenger side seat of his car.

I tried blotting, and tried a little carpet stain remover, but the stain is quite large and nothing seems to make a dent.

Any advice for removing oily substances from car upholstery?

You need a product that will cut the oil.

Try OMS, Oil of Mineral Spirits, cheap and readily available. Load it into a sprayer and mist the area heavily....this product will evaporate, leaving no residue or damaging anything.....and then vacuum the area.

Okay, what I am saying is, spray the OMS, work the spot with some kind of light bristle brush, and then extract it with a shop vac.

Oughta get you cleaned up after a few times.

Good Cleaning!

Dehn

WWW.CLEAN911.COM

Do you have a shop vac? A technique I like to use when there is a lot of material to remove is to wet spray and extract with vacuum and repeat until it's removed. In this case, you could use a 50/50 solution of water and simple green which cuts grease.

I'm an old upholsterer and could be of some help here. But first need to know more about the fabric.

Well in my own experience.. I try all the possible solution but nothing works.. So I forced to call a carpet cleaning services to clean the mess..

You will need the power and extraction of a steam cleaning machine. Preferably a truck mounted machine. Then you will be able to pre treat with a solvent and rinse and extract all the butter out of the upholstery. All your doing is spreading it around and working into the fabric really. I now as I'm a 18 year veteran in the industry and own carpet cleaning orange county.

If you must do it yourself then you will need a portable carpet cleaning machine to be able to rinse out your cleaner as well as the butter and soil. We come across this all the time at carpet cleaning Tampa.

You better go for a professional cleaning service.

I'm also using Professional cleaning service