HONDA 2003 S2000 - Owner's Manual - Manual (Page 165)

An oil with a viscosity of 10W-30 is
preferred for optimum fuel economy
and year-round protection in your
Honda. You may use a 5W-40 oil if
the temperature in your area goes
below 0°F (
20°C).
The oil’s viscosity or weight is
provided on the container’s label.
Select the oil for your car according
to this chart.
You may use a synthetic motor oil if
it meets the same requirements
given for a conventional motor oil: it
displays the API Certification Seal,
and it is the proper weight as shown
on the chart. When using synthetic
oil, you must follow the oil and filter
change intervals given in the
maintenance schedule. Your Honda does not require any oil
additives. Additives may adversely
affect your engine’s or transmission’s
performance and durability.
Engine Oil
Maintenance
Synthetic Oil Additives
162
Ambient Temperature
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