I would try Goof Off or Goo Gone.

Hot damp rag.

Is it engineered or solid wood? What is the finish? I have oak hardwoods with a Swedish finish and nothing penetrates it. My upstairs has oak with a poly finish and same thing, nothing penetrates the finish. Sometimes it's suggested to used clay type kitty litter to absorb grease...pour it on and let it sit for an extended time. Switch it out for fresh and let it set again...see if it's making any difference. If so, keep doing it until the stain is as gone as it's going to get.
There have been some threads here recently about engineered wood floors in lighter colors being stained by grease and there seems to be no solution. You can search for them, but I think I remember reading that if something is on the floor for 10 min or more, it's not coming out.