I picked up an engine coolant tester, my coolant is testing at -17
Celsius, but should be -37 Celsius with 50/50 mix.
Question: Do I add green coolant to get to -37 Celsius or do I add
water to the resevior?
My bad: I flushed out the engine a year ago when I changed the
thermostat but was in a hurry and didn't mix correctly. Haven't had
any problems to speak of.