The 2018 Chevy Sonic requires oil that meets Dexos1 Gen 2 specifications, with 0W-20 synthetic commonly recommended. Always check your owner’s manual or the under-hood oil label for the exact grade and interval for your specific engine and climate.
Oil specification and recommended viscosity
Understanding the right oil starts with the Dexos standard. Dexos1 Gen 2-certified oils are required for the 2018 Sonic, and the exact viscosity is listed in the manual. While 0W-20 is the typical starting point for many GM engines of this era, please verify the precise grade for your trim and operating environment.
Engine options and oil requirements
The 2018 Sonic was offered with two gasoline engines: a 1.4-liter turbo and a 1.8-liter naturally aspirated unit. Both engines require oil that meets the Dexos1 Gen 2 specification. For the best guidance on viscosity, consult the owner’s manual—GM may specify 0W-20 or another Dexos1 Gen 2-grade depending on the exact engine and climate.
- Dexos1 Gen 2 certification is required for all 2018 Sonic engines.
- The commonly recommended viscosity is 0W-20 synthetic, but the manual will confirm the exact grade for your engine and climate.
Bottom line: Use Dexos1 Gen 2 oil in the correct viscosity as specified by GM for your specific Sonic model and operating conditions, and follow the prescribed oil-change interval.
Tips for buying and maintaining the right oil
Choosing the right oil is easier if you follow these guidelines to avoid incorrect oil or gaps in maintenance:
- Always look for Dexos1 Gen 2 approval on the bottle label to ensure compatibility with GM engines.
- Follow the viscosity listed in your owner's manual; if you don’t have it on hand, ask a GM dealer or reference GM’s official service information for your VIN.
- Opt for synthetic or full-synthetic blend oils, which are commonly recommended for newer engines and longer intervals, but confirm the exact spec for your vehicle.
In summary: For a 2018 Chevy Sonic, Dexos1 Gen 2 oil is required, with 0W-20 synthetic being a typical recommendation. Always verify the precise grade and interval in the owner’s manual or at a GM-certified service center.
Summary
The 2018 Chevy Sonic uses Dexos1 Gen 2 oil. The usual guidance is to use 0W-20 synthetic, but verify the exact viscosity and change interval in the owner’s manual or with a GM dealer, since engine variant and climate can affect the specification. Always ensure the oil is Dexos1 Gen 2 certified for optimal engine protection.