ACDelco dexos1 Synthetic Blend Motor Oil is specifically designed for GM vehicles. Engineered to optimize engine cleanliness, engine performance and fuel efficiency, ACDelco dexos1 Synthetic Blend Motor Oils are composed of high-quality synthetic base stocks and exceptional additive technology. Appropriate for use in most domestic and foreign vehicles, ACDelco dexos1 Synthetic Blend Motor Oil is the General Motors factory fill and the required service fill for GM vehicles with gasoline engines beginning with the 2011 model year. Recommended for use in cars and light trucks with gasoline and gasoline turbocharged engines where API SN and all prior specifications are required.

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

Is it true that new engines need break-in periods using conventional motor oil?
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.

Can Synthetic and Conventional Oils be used together?
Yes, the two can be mixed and still retain proper baseline functionality without causing any harm to your vehicles engine. However, this is not advisable, as mixing conventional with synthetic oils lessens the performance properties of the latter.

Do I need a special oil filter for a synthetic oil? Or will a regular filter do?
No, you do not need to use a special filter for synthetic motor oil. The type of oil filter used isn’t necessary 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.

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

Is there a way to tell if my motor oil needs to be changed or is running low?
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.

Will using synthetic motor oil extend the change period as shown by the oil life monitor?
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.

• 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.