GM dexos™ info
So the first thing to know is that GM's dexos™ engine oils are easy to figure out...once you read this anyway.
We'll get started by saying this: If you own a 2011 or newer GM vehicle, your owner's manual may state that you must use a motor oil that is licensed or meets GM's dexos™ specifications to maintain your vehicle's warranty.
This means you can use dexos licensed oils, or oils not licensed by dexos™ but still meet the dexos specifications.
If you see the trademarked dexos logo (shown on this page), you know it is a licensed dexos oil.
If there is no dexos™ logo on the product label, be sure it meets GM's dexos™ specifications required for your vehicle (the oil may say "meets or exceeds" "suitable for" "also recommended for"...when in doubt, ask the manufacturer if it meets/exceeds the dexos specs)
Your warranty will remain intact as long as you follow your Owner's Manual/OEM requirements. This does not limit your choices to only "licensed" products or an approval list.
Now keep in mind, there is dexos1™and dexos2™ and they are different!
Easy to remember...almost. dexos1™ is GENERALLY for gasoline engines and dexos2™ is GENERALLY for diesel engines.
MOST GM GASOLINE ENGINES:
2017 and older: Use either dexos1™ Gen 1 or dexos1™ Gen 2
2018 and newer: Use dexos1™ Gen 2
**The current dexos1™ spec is called dexos1™ Gen 2. And it's fully backwards compatible. So if you have an older vehicle (pre-2018) you use EITHER dexos1™ Gen 1 or dexos1™ Gen 2. If the oil is for 2018+ vehicles use dexos1 Gen 2.
dexos1™ oil are typically low HTHS** and are found in 0W-20, 5w-20, and 0W-30, and 5W-30 versions.
Note: dexos1™ is usually found with oils carrying other approvals or specs, most commonly API SN PLUS, API SN, and ILSAC GF-5.
MOST GM DIESEL ENGINES & SOME HP GASOLINE ENGINES:
Generally dexos2™ oils are Top Tier lower SAPS* lubricants designed for high performance gasoline and light duty diesel engines with aftertreatment (like DPFs / diesel particulate filters) systems. These oils are typically of a high HTHS** specification and are generally 5W-30 and 5W-40.
Note: dexos2™ is usually found with oils carrying other approvals or specs, most commonly ACEA C3, BMW Longlife-04, VW 505 00 / 505 01, Porsche C30 or A40 (5W-40 only).
*SAPS refers to Sulphated Ash, Phosphorus, and Sulfur - levels of these components are often limited in Low-SAPS applications/specifications.
**HTHS refers to High Temperature High Shear viscosity of engine oils - a critical property relating to durability of a running engine and fuel economy. HTHS is becoming more of a consideration in engine oil formulations due to FE (fuel economy) and GHG (greenhouse gas) considerations and legislations.