Volvo VN, Operator'S Manual

Page: 276 / 456

OPERATION 267
Driving Habits
The way in which a vehicle is being driven is the one factor which has the greatest
influence on fuel consumption. Correct driving saves fuel and reduces vehicle wear.
To achieve optimal running economy, the driver should always remember to:
•
Start the engine correctly (especially important in winter season).
•
Maintain an even and correct speed.
•
Keep the engine at its optimum speed range.
•
Use the correct uphill and downhill driving technique.
Starting the Engine
Start the engine according to the instructions in the operator’s manual of the engine
manufacturer (for a Volvo engine, see "STARTING THE ENGINE" “STARTING
THE ENGINE”, page 298). A proper start, especially during the cold season, saves
fuel and reduces engine wear.
Sluggish lube oil in the engine makes cold starting more difficult. Therefore, it is
important to always use engine oil with the correct viscosity. (For the sake of the
overall fuel economy, it is also important to have the right viscosity of transmission
and rear axle oils.)
A good sign of an axle or wheel out of alignment is uneven tire wear. Check the tires
often.
Avoid High Engine Speeds
High engine speeds mean high fuel consumption. "Jerky" driving also increases fuel
consumption when the vehicle is constantly accelerated and slowed down. Avoid a
higher consumption by steady, even driving.
Refer to each engine manufacturer’s operator’s manual for information on the engine’s
optimum operating range.
Rain, Snow and Road Surface
A wet road surface increases rolling resistance and, thereby, fuel consumption. Slush
will increase consumption even more. In certain cases, the surface structure of the
road can also have a negative effect on fuel consumption.
Hill Driving Technique
Use the inertia of the vehicle to go over the crest of a hill under reduced power. Use
gravity to help with acceleration when going down the hill. Build up speed before
reaching the next uphill.