coolant brand/style?

[Nwappleby]

Guys

I am sure its covered in the archives, but what do you use currently to top off your reservoir?

1986/6.5L non turbo

Thanks in advance.......

 

[ken]

I use Rottella antifreeze from tractor's supply. It's listed for Diesel engines. Less chance of micro bubbles and hot spots.

 

[juanprado]

It came filled with old school plain ole green stuff. I would say any good name brand green stuff not the red/orange/purple, copper or extended drain interval stuff.( I would not mix if topping off with extended) .