I don't have any oil consumption at all, I used a LS2 aluminum block, 4.100" crank, 6.125" rods 4.030" bore =418cid. (6.8L) ,yes i had custom pistons made by Ross, These were the first ever made By Ross , i spend a lot of time measuring piston clearance to crank and reluctor ring and piston out of the bore, The first set ,the counter weights hit the pistons so i put them in my mill and clearance the so i would have .060" clearance from wrist pin boss to counter weight,Sent the pistons back to Ross and they machine me a new set and they fit perfect, and then I had to machine the reluctor ring down .030" and then took the crank sensor and machine the tab so it would move deeper in the block to achieve .020" clearance from the crank sensor to reluctor ring, Then clearance the rod bolt to the block to maintain .060" clearance,Then had to clearance the front of the oil pan for the rod bolts , shimed the wind age tray for the rod bolts, The piston has ring support landing cause the wrist pin is in the oil control ring, The motor has been in my car for about five months now runs grate and also i have 250 shot of nitrous ,you can see in my sig some of the build of the 418cid.