Suggested up-shift speeds
The following are suggested vehicle speeds for shifting into a higher gear. These suggestions relate to fuel economy and vehicle performance. Actual upshift speeds will vary according to road conditions, the weather and individual driving habits.

See also:
Temperature
High temperatures accelerate the rate of corrosion
to those parts which are not well ventilated. ...
Anti-freeze
In the winter when it is anticipated that the temperature
will drop below 32°F (0°C), check the
anti-freeze to assure proper winter protection.
For details, see Engine cooling system in the
M ...
Maximum Gross Vehicle Weight
(GVW)/Maximum Gross Axle Weight
(GAW)
The GVW of the towing vehicle must not exceed
the Gross Vehicle Weight Rating (GVWR)
shown on the F.M.V.S.S./C.M.V.S.S. certification
label. The GVW equals the combined weight of
the unloaded ve ...
