i’ve serviced my fox’s and i did a bit of research into this subject. i spoke to TF tuned and Mojo and also found a load of stuff on the interweb:
Fox talas service MTBR thread
peter verdone’s webpage on fork suspension fluid alternatives
Aparently fox float fluid AND fox suspension fluid are just re-branded with the fox name. Fox float fluid is 85w gear oil (used in engine gearboxes) which is a lot thicker than the suspension fluid which is 7.5w as standard.
i was expecting the fox video to tell me to put float fluid on the seals, as this is what they bundle in with the seal kit but it actually told me to soak them in suspension fluid. So i dont really think it matters too much.
and by the way i got a syringe full of gear oil free from my local motorbike shop in exchange for a few syringes, and TF tuned recommended 5w synthetic motorbike oil (i’m under 10 stone) to reduce spiking and they feel really smooth :)