3.8L L37 L67 Engine Recommended SAE Viscosity Grade Engine Oils - cap consumption fill grade leak lubrication maintenance odor oil vibration viscosity

When servicing the vehicle with the VIN you entered, the following diagnosis might be helpful if the vehicle exhibits the described symptoms.

Some dealers may comment on conflicting information regarding oil viscosity usage guidelines for 2003 L36 and L67 applications. Dealers may state the vehicle owners manual recommends 10W30 motor oil, while the engine oil fill cap states to use 5W30 motor oil.

For the 2003 model year, 10W30 or 5W30 motor oil is appropriate for the L36/L67 3800 applications. The use of either 10W30 or 5W30 motor oil will provide necessary lubrication for engine component wear protection.

The 2003 on-line electronic owners manual information, available on the GMSPO website, has been updated to reflect this change. You may access the owners manual information at the following link:

http://spo.gm.com/dept/eng/service/

Please follow this diagnosis process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed. If these steps do not resolve the condition, please contact GM TAC for further diagnostic assistance. This diagnostic approach was developed for the vehicle with the VIN you entered and should not be automatically be used for other vehicles with similar symptoms.

(03 Buick LeSabre) and (03 Buick Park Avenue) and (03 Buick Regal) and (03 Chevrolet Impala) and (03 Chevrolet Monte Carlo) and (03 Pontiac Bonneville) and (03 Pontiac Grand Prix)