You should look for this information on the oil container, and use only those oils that are identified as meeting GM Standard GM6094M and have the starburst symbol on the front of the oil container.

Notice: Use only engine oil identified as meeting GM Standard GM6094M and showing the American Petroleum Institute Certified For Gasoline Engines starburst symbol. Failure to use the recommended oil can result in engine damage not covered by your warranty.

GM Goodwrench® oil meets all the requirements for your vehicle.

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.

When to Change Engine Oil

If any one of these is true for you, use the short trip/city maintenance schedule:

•Most trips are less than 5 miles (8 km). This is particularly important when outside temperatures are below freezing.

•Most trips include extensive idling, such as frequent driving in stop-and-go traffic.

•You frequently tow a trailer or use a carrier on top of your vehicle.

•The vehicle is used for delivery service, police, taxi, or other commercial application.

Driving under these conditions causes engine oil to break down sooner. If any one of these is true for your vehicle, then you need to change your oil and filter every 3,000 miles (5 000 km) or 3 months — whichever occurs first.

If none of them is true, use the long trip/highway maintenance schedule. Change the oil and filter every 7,500 miles (12 500 km) or 12 months — whichever occurs first. Driving a vehicle with a fully warmed engine under highway conditions will cause engine oil to break down slower.

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Chevrolet 2005 owner manual Engine Oil Additives, When to Change Engine Oil
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2005 specifications

The 2005 Chevrolet lineup presented a range of vehicles that were notable for their blend of performance, comfort, and advanced technology. One of the standout models was the Chevrolet Silverado, a full-size pickup truck that offered an impressive range of trims and configurations. With powerful V6 and V8 engine options, the Silverado was well-suited for both work and leisure. Its robust towing capacity and spacious cabin made it a favorite among truck enthusiasts who required utility without compromising on comfort.

Another highlight of 2005 was the Chevrolet Equinox, a mid-size crossover SUV that entered the market with a focus on practicality and versatility. With a spacious interior and flexible seating arrangements, the Equinox catered to families and active individuals alike. Its standard safety features, including anti-lock brakes and multiple airbags, underscored Chevrolet's commitment to passenger safety.

For those seeking a sportier option, the Chevrolet Corvette remained a symbol of American performance. The 2005 Corvette featured a sleek design and a powerful 6.0-liter V8 engine that delivered exhilarating acceleration. With its lightweight construction and advanced suspension system, the Corvette offered precision handling, making it a joy to drive on both the track and the open road. The interior was equally impressive, featuring high-quality materials and modern technology, including a premium sound system.

In terms of technology, Chevrolet was ahead of the curve in 2005. Many models came equipped with the OnStar system, providing features like navigation, emergency assistance, and stolen vehicle recovery. Additionally, the incorporation of advanced audio systems and Bluetooth connectivity options allowed drivers to stay connected while on the go.

Chevrolet also focused on fuel efficiency during this year, with several models featuring innovative engine designs and lightweight materials that improved overall gas mileage. The introduction of hybrid technology in certain models marked a step towards a more environmentally conscious lineup.

Overall, the 2005 Chevrolet models combined style, performance, and practicality, appealing to a broad audience of drivers. With a commitment to innovation and quality, Chevrolet solidified its status as a leader in the automotive industry during this era, paving the way for future advancements.
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