How do I test my current antifreeze mixture?
Use a coolant tester, refractometer, or hydrometer to measure the specific gravity or freezing point of your coolant mixture. These tools give accurate readings of your current concentration.
Can I use more than 70% coolant concentration?
No, using more than 70% coolant actually reduces freeze protection and heat transfer efficiency. Pure coolant freezes at a higher temperature than a proper mix.
What's the difference between automotive and CNC coolant?
Automotive coolants contain additives for rubber seals and metal protection, while CNC coolants are designed for machining operations with different viscosity and lubrication properties.
How often should I check my coolant mixture?
Check your coolant concentration at least twice a year, before summer and winter seasons, or whenever you add coolant to the system.
What type of water should I use for mixing coolant?
Use distilled or deionized water when mixing coolant. Tap water contains minerals that can cause scaling and reduce the effectiveness of the coolant system.
Why is proper coolant mixture important?
The correct mixture prevents freezing in winter, raises the boiling point in summer, prevents corrosion, and ensures optimal heat transfer from your engine. You might also find our Repair vs Replace Calculator useful.