Reply to "Dexcool coolant"

These days it pays to do some checking. Since about 1990- thanks mostly to Honda, there have been anti-freezes specially formulated for ALUMINUM engines. Prestone-yellow and others of the type have silicate grinding compounds in them to scour scale from iron engine castings. Silicates do this but also attack the sliding main seal inside your waterpump. They also scour aluminum castings much faster than the iron they were intended to affect, enough that long-haul trucks with alloy engine castings have had failures attributable to silicates.
Nowadays, antifreezes come in yellow, green, orange and who-knows-what color. I suggest if you have an all-aluminnum engine & radiator (like Jan) or mostly aluminum (like me), look for the type made for alloy engines. This included motorcycles, incidently. The 'new' antifreezes are more expensive but who really wants to irreversibly erode an alloy block, heads or radiator?