Yes
oil can get by a compromised intake gasket and it will quickly create deposits, espaecially at the consumpsion rate you describe. The depisits will form on the back of the intake valve and in the combustion chamber bits of it will glow and cause preignition.
Attackt the intake gaskets, that where you'll find the problem. While you're at it look in the intake ports for signs of
oil being pulled past the rocker stud threads, address as needed.