GM dexos R Raises the Motor-Oil Bar for High-Performance Engines

AMSOIL Signature Series already outperforms the new motor oil specification.

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Signature Series Synthetic Motor Oil
Brad Nelson
by Brad Nelson
January 30, 2023

GM* recently launched a new motor oil performance standard with its proprietary dexos R* motor oil specification. Dexos R denotes 0W-40 and 5W-50 motor oils that can withstand the rigors of high-speed and high-load conditions created during high-performance driving. As of now, the specification only applies to high-performance engines used in Corvettes* and Camaros*.

Modern engines with high power density, forced induction, multi-point fuel injection, cylinder deactivation and emissions systems are driving demand for more advanced lubricants. High-performance vehicles push those technologies to another level, requiring a motor oil that can protect components operating in extreme heat and high-load conditions.

Testing is complete and AMSOIL Signature Series already outperforms the dexos R specification. The dexos R icon will be added to Signature Series 0W-40 and 5W-50 packages.

AMSOIL has pushed lubricant technology to new levels since 1972 when AMSOIL 10W-40 Synthetic Motor Oil became the first synthetic motor oil in the world to meet American Petroleum Institute service requirements. Since then, we have never stopped pushing ourselves to develop more-advanced formulations. The result? We continue to produce the best motor oils on the market.

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by Brad Nelson

Brad Nelson is a staff writer for AMSOIL. Outside of work he enjoys family adventures, wilderness exploration and riding/wrenching on vintage metric motorcycles.

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Signature Series Synthetic Motor Oil

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