seems odd as there are engine changes in the years
like the ls 400 in 95
the es in 94
the other engines are identical
as well is the rx having the same engine over it life and sharing it from the es 94 to now 1mz-fe
my only query is over the year splits and where an adittinal 30,000 across the borad can come from
but it may be that the 93 and previous used a cast iron block causing adiditonal stress from weight of moving components
as opposed to aluminum