This weekend me and my dad are changing out the thermostat on his truck and will need coolant to do this job. I have noticed on rock auto, the OEM ford coolant is yellow in color.
If I recall correctly, the coolant in his block is orange, which I believe is pretty much dex cool which to my understanding is a crap coolant.
My question is this: Should I drain the whole system and get yellow, or would mixing yellow and orange be ok, or should I just get orange to be safe?
Thanks.
https://www.motorcraft.com/content/dam/ford-motorcraft/en_us/motorcraft_global/products/lubricants/quick_reference_charts/antifreeze_coolants_english.pdf
It’s going to depend on the build date of your truck. Ford says you can mix them, though.