New engine has loss of compression

Well I just finished doing the compression test and like I thought, I have a lame cylinder :(

1- 135 PSI
2- 134 PSI
3- 134 PSI
4- 99 PSI! I squirted some oil in and it went up a bit to 112 PSI
5- 133 PSI
6- 139 PSI
7- 131 PSI
8- 131 PSI

Number 4 is the issue here. Now because the PSI went up a bit does that mean its the piston ring? I assume its normal for a bit of blowby to occur. I will try to get a leakdown tester to see what is leaking though.