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Coolant in a K100
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I want to change the coolant on my 89 K100. I have a jug of Super Tech prediluted 50/50 antifreeze/coolant. Says on the label it is compatible with any antifreeze. Any car with aluminum and other engine metals.  I used Zerex G-05 previously (recommended by a friend). Any opinions? The Super Tech is left over from my KLR coolant change which is not too picky from the fluids it uses. Thanks Ken in Katy.
 
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