I bought a second hand vehicle that has an orange colored
anti-freeze. I have a container of the green colored type.
Does it hurt if I add the green colored type (when needed)?
"larry moe 'n curly" wrote:
Here's what GM says about mixing their orange/red Dex-cool with
regular green antifreeze:
"Mixing conventional green coolant with DEX-COOL® will
degrade the service interval from 5yrs./150,000 miles to
2yrs./30,000 miles (50,000 km) if left in the contaminated
condition. If contamination occurs, the cooling system
must be flushed twice immediately and re-filled with a
50/50 mixture of DEX-COOL® and clean water in order to
preserve the enhanced properties and extended service
interval of DEX-COOL®"
I've been using nothing but Dex-cool in my 1993 Ford and 1986 Toyota.
Apparently it doesn't hurt at all, except for the extra cost of
changing coolant every two years instead of every five years.
If you don't "flush twice immediately and refill ..... etc." you
will still have coolant protection but you will face that extra
cost two years from now.