you're pretty much effed. my cobbler failed me. various solvents all failed. washing shoe with lots of wter failed. However, the passage of time (several months) and pushing the nap around with a suede brush, actually 90% suceedeed, and learning to ignore took care of the rest.

 

I've had moderate success with a pair of white bucks but I'm not sure if suede will respond differently. Several applications of talcum powder will slowly soak up the most of the oil. Just work a generous amount into the affected area lightly, let it sit for a day, brush off and repeat. Once you stop seeing any improvement, wet both shoes down thoroughly, scrub it with suede cleaner and a nylon brush, air-dry and see what you end up with. If it's still very noticeable, try shaving the nap and raising a new one with the edge of a knife. If that doesn't work, then enjoy your new lawn-mowing shoes.

 

French Green Clay is often recommended to absorb grease from material. It is cheap and widely available. I have never had cause to use it myself as yet - but do keep an amount in my wardrobe, just in case of accident.

 

^^
+1. I think hardline 42 has once again hit upon the approach most likely to succeed in correcting the OP's dilemma. However, twice in the past I have treated oil stains on smooth surfaced leather shoes by applying rubber cement to the stain (which also serves to draw the stain out) and allowing it to dry and then peeling the dried rubber blob off of the shoes. In both instances it worked surprisingly well. However, with sued finishes, I fear the rubber cement approach would mostly serve to denude your suede...not a good outcome at all!

 

Never heard about the clay before, Shaver, but that's a good idea. I was going to suggest corn starch or talc, as HL42 suggests. Whichever you use, the purpose is to draw out the oil from the pores of the leather. You could possibly steam up the area beforehand, to open the pores a bit more, but don't blast them with the steam - the intent being to warm the area, not wet the area.

Good luck.

 

Thanks for the suggestions. I had surprising good luck with Hardline's approach: talcum powder followed by an eraser. About 90% of the stain disappeared; the remaining 10% will blend in over time, as Rambler suggested.

 

Thanks for the suggestions. I had surprising good luck with Hardline's approach: talcum powder followed by an eraser. About 90% of the stain disappeared; the remaining 10% will blend in over time, as Rambler suggested.

I'm glad it worked for you. The same method works well for grease stains on ties, as well.