Originally Posted by abe g

Using prestone (green) over 32 years. in my 77 450sl. Replaced one water pump in that time. (replace prestone every 5 years)This is an ongiing discussion,suggest that water content is critival factor. If local water is reasonably free of minerals, no problems.If heavy mineral content no antifreeze is fool proof. Just my 2 cents. Good luck all,Abe G