The Chevy Volt uses engine oil that meets GM’s Dexos1 specification. For Gen 1 Volts (2011–2015) the typical recommendation was Dexos1 with a viscosity around 5W-30, while Gen 2 Volts (2016–2019) commonly use Dexos1 Gen2 oils, often in lighter viscosities such as 0W-20. Always verify the exact grade for your year and climate in the owner’s manual or on the oil filler cap.
Understanding the Dexos standard
Dexos is GM’s standard for gasoline engine oils, designed to protect modern engines across a range of temperatures and driving conditions. The Volt’s gasoline range-extending engine requires an oil that meets Dexos1 specifications, with newer Gen2 engines typically aligned to Dexos1 Gen2. The exact viscosity you should use depends on model year, climate, and driving habits.
Oil specifications by generation
Below are the typical expectations reported by owners and service guides. The precise grade for your year and climate should be confirmed in the owner’s manual.
Gen 1 Volt (2011–2015)
Most Gen 1 Volts use Dexos1-compliant oil with a viscosity of 5W-30, in either synthetic-blend or full synthetic form. Some climates or service notes may allow 0W-30, but 5W-30 is the standard recommendation.
- Specification: Dexos1 (Gen 1)
- Common viscosity: 5W-30 (synthetic-blend or full synthetic)
Gen 1 conclusion: The engine requires Dexos1 oil with a 5W-30 viscosity in typical conditions; confirm the exact grade from the owner’s manual for your vehicle and climate.
Gen 2 Volt (2016–2019)
Gen 2 Volts use Dexos1 Gen2 oils, with 0W-20 being a common choice for many markets. Some regions may allow 5W-30 depending on temperature ranges and manufacturer guidance. Always verify the exact grade for your model and location in the manual.
- Specification: Dexos1 Gen2
- Common viscosity: 0W-20 (some markets may use 5W-30)
Gen 2 conclusion: The later Volt generations typically require Dexos1 Gen2 oil, often in 0W-20, but confirm the exact grade and capacity from the manual or a Chevrolet service center.
Finding the exact grade for your Volt
To ensure you’re using the correct oil, check the owner’s manual, the oil filler cap, or GM’s service information for Dexos1 Gen1 or Gen2 specifications. If in doubt, consult a Chevrolet dealer or a qualified mechanic. Using the wrong Dexos specification or viscosity can impact engine protection and warranty coverage.
Maintenance tips and best practices
Follow the maintenance schedule in your owner’s manual for oil change intervals and filter replacements. Always purchase oil that clearly states it is Dexos1 (or Dexos1 Gen2, as appropriate for your model year) and match the viscosity to the climate and driving conditions you typically encounter.
Summary
The Chevy Volt’s engine oil must meet GM’s Dexos1 specifications. Gen 1 models commonly use Dexos1 with 5W-30 viscosity, while Gen 2 models typically use Dexos1 Gen2 oils with 0W-20 viscosity. The exact grade varies by year, climate, and driving conditions, so always verify with the owner’s manual or a Chevrolet service professional before purchasing oil or performing an oil change.