Oil keeps going into combustion chamber. Burning like CRAZZYY!! I recently rebuilt my b18a engine with pr3 pistons (kept it STD). New pistons and rings. Block was honed and resurfaced. Head was sand blasted and clean (like brand new), pressure & leak down tested and good. New valves, valve angle seating, springs, seals, and resurfaced. Still burning oil. Valve guides are old ones so I thought it was the problem...but the shop checked it and they are good. Compression test- 182 across the board and holding. I'm TOTALLY frustrated cause I can't figure out what it is. Any help would be appreciated.