Ford Super Duty Owner's Manual
Anybody come across anything interesting reading your owner's manual?
Forum Discussion
agesilaus wrote:The coolant test was really in case someone topped off the coolant bottle with the wrong coolant. Ford has switched from the Orange coolant to a new Yellow coolant that last even longer so I doubt a recharge is necessary.
Be careful with that, the older, 2012 trucks, call for orange unless the yellow is an approved substitute. And the coolant tests detect weak coolant and Ford sells a concentrate that you can add to boost the coolant concentration. Comes in a liter bottle
Ford doesn't make the orange coolant anymore and the yellow coolant is backwards compatible. Meaning you can mix the yellow with the orange. I don't believe Ford sells a booster for the yellow since it already last extremely long. The OP is purchasing a new 2021 Super Duty so it will come with Yellow coolant so the orange coolant is no longer a issue.
