Motul Gear Oil 75W90 - 1 Liter
Motul produces the finest performance lubricants in the world. Motul Gear 300 75W/90 Gear Oil is a 100% synthetic high-performance gear oil designed for use in manual transmissions. Meets both GL4 and GL5 specifications. Suitable for all types of driving/racing conditions, ideal for synchronised or not synchronised gearboxes, gearbox/differential, transfer gearboxes.
2 Liters are recommended for transmission fluid replacement.
The dealer oil is a touch thinner so tends to shift more smoothly when the trans is cold. The Motul gear 300 is a bit thicker, there is less gear wine, and it's specifically recommended by Wavetrac. Started running that when I installed the Peloquin LSD in my 02M.