Buick 2005 LaCrosse User Manual download pdf (Page 294)

If you are in an area of extreme cold, where the

temperature falls below −20°F (−29°C), it is

recommended that you use either an SAE 5W-30

synthetic oil or an SAE 0W-30 oil. Both will provide

easier cold starting and better protection for your engine

at extremely low temperatures.

Engine Oil Additives

Do not add anything to your oil. The recommended oils

with the starburst symbol that meet GM Standard

GM6094M are all you will need for good performance

and engine protection.

Engine Oil Life System

When to Change Engine Oil

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

vary considerably. 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 engine oil light or, if your vehicle

has the Driver Information Center (DIC), a CHANGE

OIL SOON message will come on. See Change Engine

Oil Light on page 3-43 or DIC Warnings and Messages

on page 3-53. Change the oil as soon as possible

within the next 600 miles (1 000 km). 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, the engine oil and

ﬁlter must be changed at least once a year and at

this time the system must be reset. Your dealer has

GM-trained service people who will perform this

work using genuine GM parts and reset the system. 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 the oil at 3,000 miles (5 000 km) since the last

oil change. Remember to reset the oil life system

whenever the oil is changed.

How to Reset the Engine Oil

Life System

The Engine Oil Life System calculates when to change

the engine oil and ﬁlter based on vehicle use. Anytime

the oil is changed, reset the system so it can calculate

when the next oil change is required. If a situation

occurs where you change the oil prior to a change

engine oil light or CHANGE OIL SOON message being

turned on, reset the system.

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Buick 2005 LaCrosse User Manual Page 294

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