I have a Cummins 6BT5.9. I bought 2002 32/34' Nordic Tug, with a Cummins 6BT5.9. Reading the manual they recommend using a Fleetguard refractometer, P/N CC-2800, to check the antifreeze concentration.
Question: This particular refractometer costs over $200 yet refractometers advertised on Amazon sell for $21. I assume the cheap one is plastic but is the accuracy the same or sufficient?
Why does the Fleetguard refractometer cost so much?
Question: This particular refractometer costs over $200 yet refractometers advertised on Amazon sell for $21. I assume the cheap one is plastic but is the accuracy the same or sufficient?
Why does the Fleetguard refractometer cost so much?