A lot of ppl complain about sludging problems when they use dexcool. Just wondered.....would the Prestone pre-mixed stuff that is dexcool approved be as bad? Maybe the reason ppl have so much trouble with it is because they want to leave it in there 5 years and think it'll be ok.

 

Now should it be replaced because of the years or the km's?

 

i believe years because after so long corotion adds up i dont think it has to do with mileage, althogh you are supposed to do it like every 30,000k i think maybe its 50... who knows

 

So reduced life is the only differance? What about the chemical reaction mentioned earlier.

 

according to what i've read... but definatly observe product warnings before mixing...

 

the reason everyone says not to mix these two types of coolant is becuase the DEX is an organicaly based coolant and the antifreeze is chemically based, when you mix the two, the chemicals kill the organisms in the dex, creating a Sludge, which is not good for your cooling system what-so-ever!

this is why your pets die if they drink the green antifreeze!