To make things even more confusing Mobile 1 ESP 0W-40 (Dexos2) is being rebranded to Mobile 1 Supercar 0W-40, with the DexosR. So, BW5 owners with the LT4 will probably hear more about this oil soon.
Mobil 1™ Supercar 0W-40 is an advanced full synthetic motor oil specifically designed for high performance cars to provide exceptional cleaning power and wear protection, and deliver outstanding overall performance.
www.mobil.com
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The BW4 cars can continue to use the much less expensive 5W-30 Dexos1 oil.
Mobil 1™ 5W-30 is designed to keep your engine running like new by providing outstanding wear protection, cleaning power and overall performance.
www.mobil.com