Talk Morgan Forums Morgan Sports Cars Maintenance & Servicing Coolant system flush and antifreeze change.

As with any measuring instrument, it's only as good as its calibration.

I'm not convinced a refratometer type antifreeze gauge is any more accurate than a specific gravity type. However, I do conceed the indecies would likely be way more clear, for this reason alone it would very likely offer a more precise reading.

I may buy a refratometer as they've become quite affordable of late, I note you can now buy one for around £7.00 from our friends at Temu.