Chevrolet Low Cab Forward 2023 Manual page 201

200 Vehicle Care
Change Intervals
The oil and oil filter change intervals for
your engine are based on the use of
recommended oil quality and viscosity, as
well as high-quality filters such as Cummins
genuine oil filters. Using oil other than
recommended, or oil and filter change
intervals longer than recommended, could
reduce engine life. Damage to engines due
to improper maintenance or use of incorrect
oil quality and/or viscosity is not covered by
warranty. (See the Cummins Owner's
Manual for warranty details.)
Your engine was filled with a high-quality
engine oil when it was built. You do not
have to change this oil before the first
recommended change interval. Oil and filter
change intervals depend on how you use
your vehicle. For information on the proper
oil and filter change intervals. See
Maintenance Schedule 0 262.
Engine Oil Additives
Engine oils contain a variety of additives.
Your engine should not need any extra
additives if you use the recommended oil
quality and change intervals.
Warning
Used engine oil contains harmful
contaminants that have caused skin
cancer in laboratory animals. Avoid
prolonged skin contact. Clean skin and
nails thoroughly using soap and water
not mineral oil, fuels or solvents. Launder
or discard clothing, shoes or rags
containing used engine oil.
Engine Oil Viscosity Chart
Select appropriate engine oil in accordance
with the table below. It is also important to
select the viscosity appropriate for the
temperature at which your vehicle operates.
Use the following table for making correct
selections.
Engine oil viscosity (thickness) has an effect
on fuel economy and cold-weather starting.
Lower viscosity engine oils can provide
better fuel economy; however, higher
temperature weather conditions require
higher viscosity engine oils for satisfactory
lubrication.
When choosing an oil, consider the range of
temperature your vehicle will be operated in
before the next oil change. Then, select the
recommended oil viscosity from the chart.
Do not use any viscosity of oil not
recommended. Such oils could cause engine
damage.