When you're using bio oil to remove scars it can take as long as 8 weeks of applying the bio oil to see results.
After around 8 weeks of using bio oil to remove scars you should notice the scars start to disappear.
If the scars are still there after 8 weeks of using bio oil then it may take a little longer depending on the size of the scar.
Some scars are also really hard to get rid of and some more severe scars may never disappear but the use of bio oil should at least make the scars less visible.
Most scars do go away after the 8 to 12 weeks of using bio oil though.
So it takes awhile but you should see results after at least 12 weeks of using the bio oil on the scars.