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What is Dexos 1 oil?

Dexos 1 is a motor oil specification created by General Motors (GM) for petrol engines. It ensures superior engine cleanliness, protects against sludge formation, and improves fuel efficiency. It is specifically designed for GM's latest models, particularly those requiring enhanced wear protection and performance under high stress and in varying temperatures.

Relevance: Dexos 1 remains in use for many GM petrol engines, but it has been superseded by Dexos 1 Gen 2. The newer Gen 2 specification offers improved performance, better fuel economy, and more advanced protection for modern motor technologies.

Main characteristics:

Viscosity: 5W-30, 0W-20, 5W-20
Specifications: ACEA A3/B3, ACEA A3/B4, API CF, API SN, API SN Plus RC
Application: GM petrol engines

Dexos 1, Dexos 2, Dexos 1 gen 2: Key Differences

Features	Dexos 1	Dexos 2	Dexos 1 Gen 2
Engine type	Petrol	Petrol and diesel	Petrol
Protection level	Standard protection for petrol engines	Enhanced protection, especially for high-performance and diesel engines	Improved protection for petrol engines with enhanced wear control and fuel economy
Application	Normal driving conditions	Harsh conditions and high-performance engines	For newer petrol applications, optimised for fuel economy, lower emissions, and greater high-temperature stability
Emission standards	Focuses on reducing emissions	Complies with European and GM standards for both petrol and diesel engines	Enhanced emission controls to comply more with modern standards, as well as higher protection against sludge and deposits
Oil viscosity grades	Typically 5W-20, 5W-30	Typically 5W-30, 5W-40	Usually 5W-30, 0W-20, 5W-20
Engine efficiency	Optimised for fuel economy in petrol engines	Optimised for engine protection and longevity, including in turbocharged engines	Further enhanced fuel economy, offering greater efficiency than the original Dexos 1 standard
Extended oil change intervals	Standard oil change intervals	Extended intervals, especially for high-performance vehicles or those operating under heavy loads	Supports extended oil change intervals, especially for newer engines
Compatibility	Designed primarily for GM petrol vehicles	Compatible with a wider range of GM vehicles, including diesel and European models	Compatible with newer GM petrol vehicles, meeting stricter, modern performance requirements

Dexos 1 Engine oil

What is Dexos 1 oil?

Dexos 1, Dexos 2, Dexos 1 gen 2: Key Differences

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