Well, i hate both.
Altohugh i know a hell of alot about Chemistry as im a marine engineer and you have to have chemistry.
It's all about the sodium and vanadium ratio's in the engine that can cause deposits and corrosion. Danger Zone is concidered to be 0.15 -0.30.
Same with copper in the cooling system..
I guess im the only person who knows what im on about?
Any other Marine Diesel Engineers here?
Someone say yes?... please