Are these antifreeze concentration testers reliable? If so, I think I am good for winter : r/MechanicAdvice

Coolant Tester Accessory,Automotive Antifreeze Tester

3-in-1 Antifreeze Tester in Fahrenheit Scale for Checking Freezing

Good coolant right?? Seems off the chart! Taken from radiator

Function 1: Measuring freezing point temperture of ethylene glycol or propylene glycol based automobile antifreeze coolant. Scale range: ethylene

Tiaoyeer Antifreeze Refractometer - 3-in-1 Coolant Tester for Checking Freezing Point, Concentration of Ethylene Glycol or Propylene Based Automobile

Mechanic says add WATER to coolant expansion tank. : r/MechanicAdvice

Coolant Tester Accessory,Automotive Antifreeze Tester

Will this product do more harm than good? Is it even worth using

Mechanic says add WATER to coolant expansion tank. : r/MechanicAdvice

Good coolant right?? Seems off the chart! Taken from radiator

CRAFTSMAN Automotive Antifreeze Tester in the Auto Diagnostic

Mechanic says add WATER to coolant expansion tank. : r/MechanicAdvice

How to check your Antifreeze / Winter / Checking your Car or Truck

My bf put water in the windshield wiper fluid container. Is this a