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Geof3 · 04-30-2018, 08:24 PM

Now I'm trying to nail down what I'm reading. Mine is temp compensating, and I calibrated it with the distilled water and unit being in the same environment. Tested my new coolant (Porsche) and got a reading of -30 deg Celsius. The 50/50 chart on the bottle states protection level @ -37 deg Celsius. Given mine is reading -30 should I add a bit more undiluted coolant when it needs it, or just leave it as it is and be good to go?

04-30-2018, 08:24 PM	#1
Geof3 Registered User Join Date: Feb 2017 Location: CO Posts: 989	So I bought a refractometer... Now I'm trying to nail down what I'm reading. Mine is temp compensating, and I calibrated it with the distilled water and unit being in the same environment. Tested my new coolant (Porsche) and got a reading of -30 deg Celsius. The 50/50 chart on the bottle states protection level @ -37 deg Celsius. Given mine is reading -30 should I add a bit more undiluted coolant when it needs it, or just leave it as it is and be good to go?