You can try using something like sand like and mix it with soap and the soap and sand together well help scrub it off fast. If you are not used to getting oil on your hands like if you don't work on cars a lot then it will soak on your hands more then someone who gets oil on there hands a lot. Don't worry the oil will come off after a few days no matter what.

Washing up liquid rubber into the hands neat will break down the grease. Many of the hand cleaners must be applied to dry hands and rubbed it, you must wring your hands together and really work the detergent in, at least a minute or two of wringing. Once clean try some lemon juice to finish off the job.

Wash a sinkful of dishes with Dawn. (See Alan's answer; this is perfectly serious.)

I,ve been a mech for decades.liguid dawn is what i have used for years.

I was working on my car and I got a bunch of oil on them. Now...it wont come off. I've been scrubbing my hands for a while now. I've tried "Goop", and this "fast orange" hand cleaner. Its not working.! Someone help?? Any ideas?