2003 Chevrolet Corvette Owner's Manual - Page 330

Footnotes t The U.S. Environmental Protection Agency or the California Air ResourcesBoard has determined that the failure to perform this maintenance item will nullify not 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@(orevery 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.) 35,505iir'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 il dusty conditions. Replace filter if necessary. An Emission Control Service. (See footnote f.) 6-5