See also:

Gross Vehicle Weight (GVW) and Gross Vehicle Weight Rating (GVWR)
Gross Vehicle Weight The Gross Vehicle Weight (GVW) must never exceed the Gross Vehicle Weight Rating (GVWR). Gross Vehicle Weight (GVW) is the combined total of the weight of the vehicle, ...

Parking on a grade
Always block the wheels under both vehicle and trailer when parking. Apply the parking brake firmly. You should not park on a hill or slope. But if parking on a hill or slope cannot be avoided ...

Recommended grade and viscosity
Each oil manufacturer has its own base oils and additives. Never use different brands together. For details, refer to “Manual transmission, front differential and rear differential gear oil”. ...