I'm a nailhead guy but this question pertains to any auto with aluminum parts. What is the ideal ph factor of 50/50 coolant and antifreeze? I'm thinking it should be in the middle of the scale. But what if it isn't? What do I use to raise or lower the ph? I have an aluminum radiator and would like it to last as long as possible. Thanks for any feed back. By the way the ph level on my coolant now is about 10.