If it's real leather, the light-colored leather got dark-colored oil stains, since it is impossible to completely deal with good.
But to teach you a few small ways to reduce, you first leather on the more oil marks off (do not rub everywhere). Then use an eraser to gently rub back and forth in a circular motion on the traces left on the leather surface. .... If the oil soaked into the leather inside, you can use a knife in the leather surface gently scrape (remember, action to be light oh.) ....... Until you see the color lighten. In the place where you have scraped will leave a white piece, you use transparent shoe polish shoes milk coated with it, let the leather absorb a little, and then use a dry cloth to wipe back and forth on it, you can return to a certain luster. If the gloss is not enough, you can put on some shoe milk, let the leather absorb it for a while, and then use a dry cloth to polish it. If you don't have shoe milk, you can use your face or hand cream (a little heartache). ....
In the process of using the rubber or knife scraping the process, remember not too violent Oh (I'm talking about the general treatment), because there are too many types of leather, treatment will be different, if you find the situation with me to say different, then immediately stop, when you have time to get some shoes maintenance place to go, ten dollars or so can solve this problem.