Cadillac ATS vehicles generally require Dexos1 Gen 2 certified full-synthetic motor oil, most commonly in the 5W-30 viscosity range. Always verify the exact specification and viscosity for your engine and climate in the owner’s manual or with a Cadillac service advisor.
Oil by engine type
The ATS was offered with several engines, and while the Dexos1 Gen 2 specification covers all of them, the most common viscosity you’ll see in manuals and dealer guidance is 5W-30. The following represents typical factory guidance across the main engine options; always confirm with your specific vehicle's manual or dealer for your model year and market.
- 2.0L turbo four-cylinder: Dexos1 Gen 2 5W-30 full-synthetic motor oil is standard for most years and markets.
- 2.5L four-cylinder: Dexos1 Gen 2 5W-30 full-synthetic motor oil is typically specified.
- 3.6L V6: Dexos1 Gen 2 5W-30 full-synthetic motor oil is typically specified.
If you live in an extreme climate or have a specific warranty condition, your manual or dealer may call for a different viscosity (for example, 0W-30 in very cold environments). The quickest way to be certain is to consult the owner’s manual or Cadillac service guidance, and to check the oil filler cap and under-hood label for the exact specification and viscosity requirements.
What is Dexos1 Gen 2?
Dexos1 Gen 2 is General Motors’ oil specification for many modern engines, including the ATS. Oils meeting this standard provide built-in protection against wear, deposits, and oxide formation across a range of operating conditions. When shopping, look for the Dexos1 Gen 2 certification on the bottle and ensure the chosen oil matches the viscosity recommended for your engine.
Use of the correct Dexos1 Gen 2-rated oil helps maintain engine performance and warranty coverage. If in doubt, ask a Cadillac technician to confirm the exact grade and spec for your vehicle’s year and engine.
Practical oil maintenance tips
To align with factory guidance, use a high-quality Dexos1 Gen 2 full-synthetic oil and replace the oil and filter at intervals specified by your owner’s manual, typically every 7,500 to 10,000 miles under normal driving, with shorter intervals for severe conditions. Always double-check the exact viscosity and specification for your engine before purchasing oil.
Summary
In most Cadillac ATS models, the oil specification you’ll need is Dexos1 Gen 2 rated, with 5W-30 being the most common viscosity across the 2.0L turbo, 2.5L, and 3.6L engines. Always confirm the exact requirements in the owner’s manual or with a Cadillac dealer, and ensure the oil you buy carries the Dexos1 Gen 2 designation.