How to add antifreeze

[solo379]

The whole system was flushed 2 months ago.

You did that? Or "somebody" told you, they did?

The whole system was flushed 2 months ago.

You did that? Or "somebody" told you, they did?

Nope, I paid a local Freightliner dealer to DOT my truck and trailer and to go over my truck from head to toe. They flushed the system, oil analysis, front end align, wheels balanced and a PM.

I was just fooling around with my 30 year old hydrometer the other week and it said good for 20 degrees so I figured I would add some antifreeze. I bought 2 gallons from the dealer and also got some test strips and come to find out it was good to -35 so the problem was my hydrometer.