Ford Super Duty Owner's Manual
Anybody come across anything interesting reading your owner's manual?
Forum Discussion
agesilaus wrote: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.
That's good info since coolant is the next fluid change on my list, I've done trans, differential and transfer cases. All easier than I expected
My differential (front/rear) fluid is still the factory lube so it probably needs to be changed although I believe the manual says it's doesn't ever need to be changed.
