GM dexos R Raises the Motor-Oil Bar for High-Performance Engines AMSOIL Signature Series outperformed before the GM motor oil specification. Try the 5W-50 Corvette oil available here in Sioux Falls. _by Brad Nelson |January 30, 2023 Reposting this past article on our Signature Dexos R 0W-40 and 5W-50. They’re huge sellers in our Omaha location […]
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