Hi guys, I have a ZF6hp19 transmission in my 2007 335I auto. I changed the fluid at 50K, with pentosin ATF1. Its been fine so far, but I wanted to know how you guys felt it compares with Royal Purple ATF. MSDS states that the pentosin is mineral oil based+additives, while the Royal Purple is Synthetic based+additives. Here are the specs
PENTOSIN ATF1
Density at 15 °C kg/m³ 850 DIN EN ISO 12185
Kinematic Viscosity at 100 °C mm²/s 7.6 DIN EN ISO 3104
Kinematic Viscosity at 40 °C mm²/s 38.0 DIN EN ISO 3104
Viscosity Index 171 DIN ISO 2909
Dynamic Viscosity at -40 °C mPa*s 14000 ASTM D2983
Pour Point °C -51 ISO 3016
Flash Point °C: 210
Royal Purple ATF
Kinematic Viscosity at 100 °C 7.5 cST
Kinematic Viscosity at 40 °C 32.5 cST
Viscosity Index 164 SSU
Dynamic Viscosity at -40 °C 3,852cP
Pour Point °C -51
Flash Point °C 226
It turns out the units of measure here are directly cross-comparable. So my question is this:
Which ATF would be best for year round highway use in weather with hot summers (105F), and cold winters (-10F), plus 3 full track days during the summer. (299 ft/lbs of torque at the wheels stock)
Thanks
PENTOSIN ATF1
Density at 15 °C kg/m³ 850 DIN EN ISO 12185
Kinematic Viscosity at 100 °C mm²/s 7.6 DIN EN ISO 3104
Kinematic Viscosity at 40 °C mm²/s 38.0 DIN EN ISO 3104
Viscosity Index 171 DIN ISO 2909
Dynamic Viscosity at -40 °C mPa*s 14000 ASTM D2983
Pour Point °C -51 ISO 3016
Flash Point °C: 210
Royal Purple ATF
Kinematic Viscosity at 100 °C 7.5 cST
Kinematic Viscosity at 40 °C 32.5 cST
Viscosity Index 164 SSU
Dynamic Viscosity at -40 °C 3,852cP
Pour Point °C -51
Flash Point °C 226
It turns out the units of measure here are directly cross-comparable. So my question is this:
Which ATF would be best for year round highway use in weather with hot summers (105F), and cold winters (-10F), plus 3 full track days during the summer. (299 ft/lbs of torque at the wheels stock)
Thanks
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