there are two products very good on Fabric
Motsenbocker's Lift Off #2 and WD 40
my own tip, u can use little shampoo (shampoo gets the grease out of hair), but ur stuff have to washable, after u put on shampoo and u have to use warm water wash it.
If the fabric is white, use Javex. Always test it out in some inconspicuous area first.
Gasoline should be able to do it as well. Again, test it out first.