ACDelco dexos1 Fully Synthetic Engine Oil

Engineered to improve engine cleanliness and performance, ACDelco dexos1 Fully Synthetic Engine Oils are composed of high-quality synthetic base stocks and exceptional additive technology. ACDelco dexos1 Fully Synthetic Engine Oil is the General Motors factory fill and the required service fill for GM vehicles with gasoline engines beginning with the 2011 model year. It is recommended for use in cars and light trucks with gasoline and gasoline turbocharged engines where API SN and all prior specifications are required.


• Meets ILSAC GF-5 specifications to fulfill current energy-conserving performance standards.
• Meets API SN Service Classification requirements to be suitable for use in modern engines.
• Provides protection against high-temperature deposits to reduce engine wear.
• Provides protection against viscosity breakdown for long oil life and drain intervals.
• Protects against the formation of sludge and varnish deposits on engine parts to provide additional engine support even in demanding stop-and-go driving conditions.
• Meets dexos1 specifications, resulting in high resistance to oxidation, excellent low-temperature flow and pump ability during cold start-ups, and excellent protection against formation of sludge and other harmful deposits.


An oil change for your vehicle might be necessary:
• If your vehicle’s oil level is low.
• If there are unusual noises from under the hood.
• If your vehicle’s oil is very dark or thick.
• If the oil life monitoring system in your vehicle is approaching zero percent, or if you have driven more than the recommended kilometers in your owner’s manual.

• Black fluid leaking from the vehicle could be an engine oil leak.
• A heavy thick smell originating from under the hood or from the exhaust could be a sign of burning oil within the engine .


• Your motor oil must be changed regularly.
• Replacing dirty oil and filters will help protect the inside of your engine from premature wear.
• Use the recommended grade of oil for your vehicle as found within your owner’s manual.
• Follow either your vehicle’s oil-life monitoring system or your vehicle owner’s manual recommended oil change intervals.
• Check your dipstick at every fuel fill for oil levels and color. For the most accurate reading, wait a few minutes after turning off the engine to give the oil time to drain from the crankcase into the oil pan.


Q: Should I flush my engine before switching from conventional to synthetic or vice versa?
A: No, it is not necessary to flush your engine when switching between conventional and synthetic motor oils.

Q: Is it true that new engines need break-in periods using conventional motor oil?
A: No, it is not true that new engines need a break-in period using conventional motor oil. New engines can be run with conventional or synthetic motor oils while still properly breaking in the engine components.

Q: Do I need a special oil filter for a synthetic oil?
A: No, you do not need to use a special filter for synthetic motor oil. The type of oil filter used isn’t necessarily based on the type of oil, but rather on vehicle specifications. Always use the quality of filter that meets the specifications denoted in your owner’s manual.

Q: Does my vehicle require a specific amount of motor oil?
A: Yes, your vehicles owner’s manual will contain information containing to the oil specification and capacity for your engine.

Q: Is there a way to tell if my motor oil needs to be changed or is running low?
A: Yes. If equipped, your vehicle’s oil-life monitoring system will inform you when your motor oil needs to be changed, or, as a minimum, once every year. If your vehicle does not have an oil life monitoring system, change the oil per owner's manual guidelines. Periodically check your vehicle’s motor oil dipstick for your oil levels. For more information regarding vehicle specific oil life and appropriate oil levels, check your vehicles owner’s manual.

Q: Will using synthetic motor oil extend the change period as shown by the oil life monitor?
A: No, the oil life monitor is not impacted by the type of oil used, it is only influenced by the amount and type of driving. Synthetic oil will, however, improve the protection provided to the engine by the lubricant.