I wouldn't waste my time using Motul or Red Line.
Motul isn't all what it's cracked up to be. I've seen Motul vs. Amsoil comparisons in the past where factory crosshatch marks were all worn out using Motul and were still like new with the Amsoil.
Also with
ASTM testing of Red Line & Mobil 1, both of these had much higher wear scars than with Amsoil. You guys are all nuts not to use Amsoil. You're going after oils based on big companies who throw lots of money into fancy marketing campaigns instead of higher performing oils like Amsoil.
I was a big fan of Red Line in the past until I started doing my own research. I've seen Amsoil perform miracles in engines and transmissions that no other oil has done, otherwise I would have not wasted my time here posting about it. It's your drivetrain. You guys can do what you want. I'm just trying to offer suggestions that will help you guys avoid an engine or tranny rebuild down the road.
If I ever lose my day job, I'll probably become a dealer for Amsoil in the future since I know this stuff works.