My car has a slow coolant leak from the radiator so I've been topping up with distilled water until I can afford to have it fixed.
Colder weather is here, so I bought an antifreeze test to make sure the coolant isn't too diluted.
Test is showing protection down to -7c and I want it protected to -20c.
Can I turkey baster some of the current mix out of the expansion tank, pour in G13 concentrate, run the car for a while and then retest & repeat until it's where I want it? Any risks to doing this?
Car's a 2014 VW Golf GTi.