Good morning! I am sending this email as a follow up. I have researched the
information you requested on how the GM Oil Life System works.
GMOLS is not simply a mileage counter; it is a computer-based software algorithm
that calculates the right time to change a vehicle's engine oil based on
operating conditions. When it is time for an oil change, a "change oil" message
will light up on the instrument panel or driver information center. The vehicle
oil should then be changed within 600 miles of the display message. The GM Oil
Life System monitors engine combustion events while also estimating oil
temperature based on other engine operating conditions. Short trips, cold
temperatures and towing loads all shorten the time between oil changes, while
highway driving and milder temperatures extend the life of engine oil. GMOLS
will automatically adjust the oil-change interval based on driving habits,
engine characteristics and climate. From here, the computer is able to determine
the rate of oil deterioration and notifies the driver when to change the oil.
The GMOLS is calibrated for use with standard "Starburst" mineral-based
automotive engine oil. Synthetic oils are not required except for the Corvette
and all 2004 vehicles equipped with Premium 3.6L V6 WT DOHC engines (currently
the 2004 Cadillac CTS, SRX, and XLR). Make sure to read the owner's manual and
select the viscosity and oil grade that are correct for your engine. Any oil
selected for use should carry the ILSAC "Starburst".
If you should need to contact us in the future, simply reply to this message or
call our Pontiac Customer Assistance Center at 1-800-762-2737. Customer
Relationship Managers are available Monday through Friday from 8:00 a.m. to
11:00 p.m., Eastern Time.
Sincerely,
Ian Hurlburt
Customer Relationship Manager
Pontiac Customer Assistance Center
information you requested on how the GM Oil Life System works.
GMOLS is not simply a mileage counter; it is a computer-based software algorithm
that calculates the right time to change a vehicle's engine oil based on
operating conditions. When it is time for an oil change, a "change oil" message
will light up on the instrument panel or driver information center. The vehicle
oil should then be changed within 600 miles of the display message. The GM Oil
Life System monitors engine combustion events while also estimating oil
temperature based on other engine operating conditions. Short trips, cold
temperatures and towing loads all shorten the time between oil changes, while
highway driving and milder temperatures extend the life of engine oil. GMOLS
will automatically adjust the oil-change interval based on driving habits,
engine characteristics and climate. From here, the computer is able to determine
the rate of oil deterioration and notifies the driver when to change the oil.
The GMOLS is calibrated for use with standard "Starburst" mineral-based
automotive engine oil. Synthetic oils are not required except for the Corvette
and all 2004 vehicles equipped with Premium 3.6L V6 WT DOHC engines (currently
the 2004 Cadillac CTS, SRX, and XLR). Make sure to read the owner's manual and
select the viscosity and oil grade that are correct for your engine. Any oil
selected for use should carry the ILSAC "Starburst".
If you should need to contact us in the future, simply reply to this message or
call our Pontiac Customer Assistance Center at 1-800-762-2737. Customer
Relationship Managers are available Monday through Friday from 8:00 a.m. to
11:00 p.m., Eastern Time.
Sincerely,
Ian Hurlburt
Customer Relationship Manager
Pontiac Customer Assistance Center
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