426 hemi with factory forged slugs would use a quart about the same time as
yours does,your piston have different elements in them to handle thermal
expansion due to heat and are a tough piston to beat ,my 446 Mopar had
forged slugs TRW and it used oil with plasm moly rings with special hone job
they get noisy also like rattle ,but nitrous was no problem for them.I say you
went the wise direction for durability.Does this help