Greetings all. I'm planning on replacing the coolant in my 1995 Mazda Miata and I'm looking to those more experienced to help me decide which one is best. At present I change the coolant every 3 years or 30k miles or so, and the car now has 30k miles on it.
The 1.8 liter motor has a cast iron block and aluminum head. I believe the coolant in it is Prestone All Makes All Models (a Dexclone?). While I don't have any major negative issues with the Prestone it does leave a brown coating on the inside of the coolant reserve bottle, which is vented to atmosphere. Perhaps an alternative coolant will keep the reserve bottle, and the cooling system, cleaner.
My research suggests a G-5 coolant might be a suitable choice, but I'd like to hear what you have to say. My primary goal is keeping my 18 year old heater core healthy, as replacement of that core usually requires removing the car's dash. After that, keeping the water pump and remainder of the cooling system healthy is next in line, followed by extended change intervals, and lastly by cost. I guess I'm just looking for the best coolant for my soon to be vintage Miata.
Any suggestions?
The 1.8 liter motor has a cast iron block and aluminum head. I believe the coolant in it is Prestone All Makes All Models (a Dexclone?). While I don't have any major negative issues with the Prestone it does leave a brown coating on the inside of the coolant reserve bottle, which is vented to atmosphere. Perhaps an alternative coolant will keep the reserve bottle, and the cooling system, cleaner.
My research suggests a G-5 coolant might be a suitable choice, but I'd like to hear what you have to say. My primary goal is keeping my 18 year old heater core healthy, as replacement of that core usually requires removing the car's dash. After that, keeping the water pump and remainder of the cooling system healthy is next in line, followed by extended change intervals, and lastly by cost. I guess I'm just looking for the best coolant for my soon to be vintage Miata.
Any suggestions?