How much oxycodone will cause fatal ovedose?

depends how you do it and tolerance level and metabolism, for example, Lets say its your first time shooting up fentanyl, you could od off just 5mg while I could do 50mg within hour to od, which that is what it took for me to od, luckily friends were with and revived me half hr it took.

for someone who gets high of opiates 1-2 times a week the max in a sitting of oxy i would do is no more than 50mg

or 15mg patch

if a daily iv user for over 6 months like I was I would say the max is

200mg oxy daily

60mg daily