ACDelco 5W-30 SN Plus Dexos1™ Gen 2 Fully Synthetic Engine Oil

ACDelco dexos2 Fully Synthetic Engine Oil

ACDelco 5W30 SN Plus Dexos1 Gen 2 Fully Synthetic Engine Oil is a resource conserving, multigrade gasoline engine oil formulated with synthetic base oils for use in passenger car and light truck engines requiring low viscosity, ILSAC GF-5 or API SN.


Preserves and protects engines

Proven metallo-organic anti-wear additive system protects engines under all operating conditions by providing excellent wear control in even the most sophisticated valve train mechanisms, including those with variable valve timing. Low viscosity, multigrade, formulation provides additional protection reduces internal engine friction. Enhanced corrosion protection ensures compatibility with gasoline/ethanol blended fuels up to and including E85.

Maintains high power and performance

Works immediately upon contact with an engine’s moving parts to create a protective coating that shields the engine against the deposits that lead to loss of performance. Provides excellent control of piston and ring deposits under high temperature conditions. Special friction modifiers assist in reducing internal engine friction for maximum fuel economy.

Saves on maintenance costs

High thermal stability and excellent oxidation resistance provides outstanding protection against in-service oil degradation that contributes to filter blocking and sludge formation in the oil galleries, crankcase and valve train.

Low oil consumption

Low volatility, synthetic base oil minimizes oil loss through evaporation.

Reduces fuel consumption:

Improved visco-metric properties, creating less friction in the engine, which contributes to improved fuel economy.

Extended drain intervals:

Resists degradation between oil changes, extending the time and mileage interval between oil changes.


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.