Can i pass a urine test for opiates (Oxycontin) In 6 days?

I have a drug test in 6 days. Its a urine test ,and i was wandering if i can pass in in 6 days after heavy use? If so whats the best way? Fake pee isn't a option.

: http://alcoholdrugstreatment.info/can-i-pass-a-urine-test-for-opiates-oxycontin-in-6-days