Fine Hair = Greasy Hair?

(Male)
Why does finer/flatter hair tend to become greasier over a short period of time compared to more full hair? the third day after i wash my hair it becomes greasy. I have tried to limit the amount of times i wash it but it makes no difference

I will have to guess on the answer to this question. If a person with coarse hair and a person with fine hair put out the same amount of sebum from the glands of the hair follicle, then there would be more wax around the hair shaft simply because the fine hair shaft would be smaller. That might appear to be very greasy to you. More frequent washings and using a shampoo for greasy hair may be better for you in solving the problem.