I assume the additive is only for the dual-clutch fluid? How do you know what fluid you have? Build date?
Yes, Build date. The early 2011 and 2012? Mustangs came with the heavier QS fluid. The fluid was changed in 2012? When exactly I do not know. I am sure someone on the forums knows the answer.
2011 Sterling Grey GT Premium, 6MT, Brembo, 3:73, GT500 axlebacks, tint, Rousch white billiard ball shift knob, Stack Racing lower black billet grille.