Chevrolet 2003 Corvette Owner's Manual page 330

Footnotes
t
The U.S. Environmental Protection Agency or the
California Air Resources Board has determined that the
failure to perform this maintenance item will not nullify
the emissions warranty or limit recall liability prior to the
completion of the vehicle's useful life. We, however,
urge that all recommended maintenance services
be performed at the indicated intervals and the
maintenance be recorded.
Engine Oil Scheduled Maintenance
Change engine oil and filter as indicated by the
Engine Oil Life System@ (or every 12 months,
whichever occurs first). Reset the system.
Your vehicle has a computer system that lets you know
when to change the engine oil and filter. This is
based on engine revolutions and engine temperature,
and not on mileage. Based on driving conditions,
the mileage at which an oil change will be indicated can
varv considerablv. For the oil life system to work
properly, you must reset the system every time the oil is
changed.
When the system has calculated that oil life has been
diminished, it will indicate that an oil change is
necessary. A CHANGE OIL SOON message will come
on. Change your oii as soon as possibie within the
next two times you stop for fuel. It is possible that, if you
are driving under the best conditions, the oil life
system may not indicate that an oil change is necessary
for over a year. However, your engine oil and filter
must be changed at least once a year and at this time
the system must be reset. It is also important to
check your oil regularly and keep it at the proper level.
If the system is ever reset accidentally, you must
change your oil at 3,000 miles (5 000 km) since your
last oil change. Remember to reset the oil life system
whenever the oil is changed. See Engine Oil on
page 5-13 for information on resetting the system.
Use engine oil meeting the GM Standard GM4718M.
After the services are performed, record the date,
odometer reading and who performed the service on the
maintenance record pages in part E of this schedule.
An Emission Control Service.
15,000 Miles (25 000 km)
Inspect engine air cleaner filter if you are driving in
dusty conditions. Replace filter if necessary. An
Emission Control Service. (See footnote
t.)
35,505 iir'iiies (50 006 kmj
Replace engine air cleaner filter. An Emission
Control Service.
45,000 Miles (75 000 km)
inspect engine air (=jeaner fiiter if
)/OU
are &i-viry i l l
dusty conditions. Replace filter if necessary. An
Emission Control Service. (See footnote
f.)
6-5