Tested the antifreeze today with my new Gunsons Tester. Easy to use and it appears that the engine is protected down to -15degC. So hopefully covered for our UK winter temperatures.
An ideal tool for simple and effective checking of antifreeze and coolant strength all year round. Whether summer or winter, freeze ups or overheating can be avoided. For use on ethylene glycol, the dial type gauge is easy to read and states the temperature in both °C and °F allowing you to determine the strength of the mixture.
MG ZT info mods and maintenance 