Mixing antifreeze?

[luvrbus]

when I put my 8v92 back in my bus Williams did not have enough detroit antfreeze for me to replace mine they told me to use zerex pre charged and recommended that i install a filter.SOD changed mine 1 time and put Texaco heavy duty in it like Tom said i ran prestone in it for years and no problems

[TomC]

JR- if you have a 6-71 or 8V-71, they have dry liners.  This is one of the reasons I got my bus with the 8V-71 so it couldn't leak from the wet cylinder liners.
The only other dry cylinder liner engines, or no liners I know of are the Caterpillar 3208, 3116/3126/C7, Cummins ISB, Mercedes-Benz Series 900.
All other engines have wet liners that you should be diligent on testing the coolant for acidity.  A coolant filter is also good.  Good Luck, TomC

[Barn Owl]

Doesn't the new low silicate antifreeze mix with both types? Everything I see for sale now says so. I am surprised no one has mentioned this. Coolant doesn't loose its ability to stop freezing, but the additives do wear out. Coolant has anti-foaming agents and corrosion inhibitors that need to be replaced when depleted. Where I work, the coolant that comes with the vehicle stays with it throughout its life. They just filter it, and test the additive condition, then adjust it if necessary. This goes for the old green stuff and the new extended life antifreeze.