i think the "lack of oil" may have scorched the cylinder walls (hypothesis
or wrong rings. OR the cat has degenerated & the loose bits gets into the engine part.
There were cases of this happening. Check the stock catalytic, if the honey-like material is still intact or broken. (you can peer into the stock cat to see the it)
then again, this is all guess hypsthesis work from me. as i dont know the history of car.
btw, is this the white SMT MR-S that you are refering too?
or wrong rings. OR the cat has degenerated & the loose bits gets into the engine part.
There were cases of this happening. Check the stock catalytic, if the honey-like material is still intact or broken. (you can peer into the stock cat to see the it)
then again, this is all guess hypsthesis work from me. as i dont know the history of car.
btw, is this the white SMT MR-S that you are refering too?