GM Tools
What you need to know about Dexos...One global company; one engine oil standard.
The dexos™ specification was uniquely designed to complement the exacting requirements of GM's advanced engine technology. The specification has gone through an extensive developmental and testing process. It requires a number of proprietary tests that are not included in current industry standards and sets performance criteria at a level that exceeds many current standards. The result is a high performance fluid providing significant wear protection, improved piston cleanliness, a reduction in volatility and oil consumption, enhanced aeration control for improved fuel efficiency, and better oxidation properties. dexos™ is an exclusive trademark of General Motors. Only those oils displaying the dexos™ trademark and icon on the front label have been certified and licensed by GM as meeting the demanding performance requirements and stringent quality standards of the dexos™ specification.
GM has found that using substandard oil can affect engine performance and, in the worst case scenario, may damage or harm the engine. Only licensed dexos™ products have been certified by GM to meet the dexos™ specification. Unlicensed products have not gone through GM's rigorous testing process, are not monitored for quality, and are not approved or recommended for use in GM vehicles. Unlicensed product quality and suitability for GM vehicles cannot be guaranteed and, therefore, use of unlicensed products may result in lower levels of performance and could cause engine damage that may not be covered under warranty.
There are many authentic licensed dexos™ products readily available at retail outlets, service repair shops, quick lube operations, and GM service centers. dexos™ licensed products are easy to identify. Simply look for the dexos™ icon on the front label and the 11 digit alphanumeric dexos™ license number on the back label. Unless an oil package displays these two markings, the engine oil is not an authentic, licensed dexos™ product and is not recommended for use in GM vehicles.
dexos™ is recommended by GM for use in all its vehicles except those with Duramax diesel engines requiring the use of API CJ-4 engine oil. dexos™ is fully backward-compatible and can be used in older vehicles. It is specified in the owner's manual for all 2011 and later model years, with the exception of Europe where dexos™ is specified starting in model year 2010.
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