Verified answer

They require diesel fuel.

Antifreeze For Diesel Engines

Depends on the type as they make a special one for modern diesel engines. For modern systems you will also need to mix with distilled water.

the simple answer is that coolant is coolant, as long as you are using the right type...ethylene or propylene... depends on the color basically. I use advanced auto coolant in all my class 8 trucks and it works fine. anyone tells you anything else ( diesels run hotter, blah blah blah, they are wrong)

prestone has a heavy-duty formula specific for diesel engines but it would be best if you went with oem specifications in your owner manual under engine maintenance

Yep, use 50/50 mix of antifreeze and water.