I have had oil consumption issues for a while now with 2 different blocks and a few heads. I have torn it apart again and am going to bring it back for a re-hone and new rings. I checked leak-down with great numbers and comp is 190 across. I have been trying to track this problem down for a while when something just ocurred to me...Both times the engine has been rebuilt the machine shops(two different ones) made the mistake of setting the guides up too high so the stem seals got smashed. After the problems were resolved, I was sure I had the gotten rid of the consumption, but it would still happen. Both times I would wait a while before checking the seals thinking the motor was using a bit more oil due to break-in. I understand the break-in process takes place very early in the motors life...so my question is...If the motor was using oil in the beginning would this prevent the rings from fully seating? This engine was putting down 142 whp and 130 ish for torque so it was making ok power...any ideas?? also towards the end before I took it apart it would use a quart in 3-400 miles if driven hard.