Originally Posted by AWD2015
SP4-M appears to be compatible with "certain Hyundai transmissions". The Genesis Coupe does not use a Hyundai transmission. Instead it uses (for my year) a ZF 6HP19 (German manufactured) transmission (same used in BMWs, Jags and even Rolls). SP4-M is likely a conductive ATF, which if the case would fry the Mechatronics (electronics), which are submerged in the ATF. ZF Lifegaurd-6 is non-conductive. I believe Hyundai actually carries/carried an equivalent... but the last I checked it was $76/qt (on sale)... it was not SP-III, or SP-<anything>. The dealership would never put SP-<anything> in a ZF transmission. ATF is only special when you have a special transmission.
Ok makes sense, but now I need to find out the truth if it is dogma floating around. Many many people use Redline D6 and other after market ATF in the Prius and it's trans is full if motor windings and electronics. My 2014 Rav4 had a ton of wiring going into the valve body and solenoids that is just sitting in the ATF.
I looked harder (now with my glasses wink wink) and found Redline D6 is ZF LifeGaurd -6 approved. So it must be non-conductive ATF also. But you would have to dig even deeper and double check if your series of trans falls inline with the below spec. A call to Redline Tech Line is still in order to clarify.
ZF Lifeguard 6 & 6 Plus - Shell M1375.4
('02 on 6 & 7 Series, '06 on 3, 5 Series and X5 with ZF 6 speed automatic BMW# 83 22 0 142 516, 83 22 0 144 137, 83 22 0 406 929, VW/AUDI # G 055 005, G 055 162 )
ZF Lifeguard 8 - Shell M-L12108
(BMW # 83 22 2 152 426 and VW/AUDI # G 060 162)
But yes, I agree SP4-M would need to have these approvals in writing as is in Redline before I would put it in. And really, SP4-M would be out of the question because we don't have a way to clarify anything pertaining to it in your application. We don't know if their Group 5 additive is non-conductive as Redline's appears to be. No matter what, a call into Redline's Tech Line is in order to get a technical clarification on the matter.