In the meantime, I think it is really important that no one mixes some other type of coolant in your vehicle while doing service. Doing most of your own service work will help insure that.
Is there something telling us we need to do this way earlier than the recommended intervals?
Walmart carries a Valvoline Zerex blue coolant for Asian cars that lists the same Mitsubishi coolant standard: MZ320125 I don't sense this product is inferior @ $11.97 per gallon.
When I look at all this information, I come away with a few things.
1. It's important to not mix this coolant with other types.
2. I see no reason to not stay with this type of blue coolant, because it is recommended for our cars.
3. I really don't need to worry about this any time soon!
4. When the time comes to change my coolant, there are some good non-factory products available. Which I appreciate people sharing on this forum.
The Valvoline product states 5 years or 150,000 miles of engine protection.
The Mirage maintenance schedules 1 & 2 are both stating 8 years or 120,000 miles for the first coolant change. After that, 6 years or 90,000 miles.
These new coolants are designed to last longer. They don't break down like the coolants of the past.
If a person waits 5-6 years or 100,000 miles to change their coolant, are they doing something wrong?