7.3 Ford coolant additive

BigToe wrote:

colliehauler wrote:
In a prior thread the number for the coolant additive was pf-22 from ford I found VC8 is this the same?

PF-22 never existed.

PM-22 was a fuel additive, not a supplemental coolant additive.

FW-16 was the coolant additive for the 7.3L.

VC-8 is the replacement for FW-16.

Thanks for the clarification, I was going by info on the thread.

One other question should you use the VC-8 from the start on a fresh fill of coolant, or later to control the ph?