L67 and L32 are the same motors. L36 and L26 are higher compression.

Those numbers looks fine to me, I've seen 160-180 be the avg for most cars.

Perhaps you have a PCV issue that is causing extra oil to be burnt or maybe even it's getting past a piston ring. Kind of hard to guess at it but if that's the only issue then I'd almost be at the screw it point and just swap the plug out often if it's getting past the rings.