In most 2018 Equinox models, you should use Dexos1 Gen 2 approved motor oil, typically 5W-30 for gasoline engines. The diesel version (1.6L Duramax) requires Dexos2 oil, with the exact viscosity specified in your owner's manual. Always confirm the specification for your VIN.
Engine choices and oil requirements
Here is how oil specifications break down by engine type in the 2018 Equinox.
Gasoline engines
This section covers the gasoline options found in most 2018 Equinox models.
- Use Dexos1 Gen 2 certified motor oil, with viscosity of 5W-30 being the most common choice. You may choose a full synthetic or synthetic-blend that meets Dexos1 Gen 2 certification.
- Both small turbo and naturally aspirated gas engines generally follow this Dexos1 Gen 2 5W-30 guidance.
Gasoline engines in the 2018 Equinox typically call for Dexos1 Gen 2 oil with a 5W-30 viscosity, and you can opt for a full synthetic or synthetic-blend that meets the Dexos1 Gen 2 standard.
Diesel engine
This section covers the Duramax diesel option available in some 2018 Equinox models.
- Use Dexos2-certified motor oil, with viscosity specified by the manual (commonly 5W-30 or 5W-40, depending on climate and driving conditions).
- Choose a synthetic or synthetic-blend that meets Dexos2 certification.
For the diesel version, Dexos2 oil is required, and the exact viscosity (usually 5W-30 or 5W-40) should be confirmed in your owner's manual or by a GM service advisor.
How to source the right oil
Take these steps to ensure you buy the correct oil for your 2018 Equinox.
- Check the owner’s manual or the information label in the glove compartment for the exact oil specification for your engine and climate.
- Look for Dexos certification on the oil bottle: Dexos1 Gen 2 for gasoline engines and Dexos2 for the diesel engine.
- If you’re unsure, ask a Chevrolet dealer or a qualified mechanic to verify the correct viscosity (5W-30 for most gas engines; 5W-30 or 5W-40 for the diesel, per manual).
Being sure of Dexos certification and the right viscosity helps protect the engine and keep warranty coverage intact.
Maintenance reminders and intervals
Oil change intervals can vary by engine and driving conditions, but GM generally recommends following the manual’s schedule and using Dexos-certified oil to maximize performance and warranty coverage.
- Gasoline engines: intervals typically align with the vehicle’s maintenance schedule and can range around 7,500 miles, depending on driving conditions and oil type (synthetic vs synthetic-blend).
- Diesel engines: intervals are often similar or slightly longer under normal conditions, but frequent or severe service can shorten the interval; always follow the manual for your Vin-specific guidance.
Always rely on the owner’s manual or a Chevrolet service advisor for the exact interval for your vehicle and driving habits.
Summary
The key takeaway is that the 2018 Chevy Equinox uses Dexos-certified oils: Dexos1 Gen 2 oil at around 5W-30 for most gasoline engines, and Dexos2 oil (typically 5W-30 or 5W-40, depending on climate and manual) for the 1.6L Duramax diesel. Verify the exact specification for your engine and VIN in the owner's manual or with a Chevrolet dealer, and choose a synthetic or synthetic-blend oil that carries the appropriate Dexos certification. Regular oil changes with the correct spec help maintain performance and warranty protection.