Stupidly used OAT coolant for 6 years in a MD2020

[ukmctc]

maybe none as you have not had any problems yet. There are obviously no signs of damage so far, over heating, water leaks...oil in water, back pressure....if it aint broke don't fix it.

 

[nigelmercier]

I've been looking at what might be available. Test strips such as these or similar would be more appropriate...

How about these for pH and alkalinity?

http://www.ebay.co.uk/itm/400504262633