The 7 speed manual Corvettes still have the forced 1-4 shift to this day. I have never understood how that can possibly save fuel in the long run, first of all most people either bypass it, or simply drive harder to avoid it! So by driving it harder they are using more fuel. Silly move GM, it doesn't work, so I don't understand why they keep the annoying thing. My last Corvette was a manual and one of the first things I did was visit my local tuner and have him remove that programming.
Now they also have cylinder shutdown technology, although this one actually works, it adds about 2-3 mpg. It can be overridden in the automatic cars by putting it in manual mode and using the paddle shifters. And with manual trans cars it only activates when the driving mode is set to eco (which not many manual drivers I have talked to will ever use)
Anyhow, I'm getting off track. I'm annoyed that this oil has been hyped up by GM and Mobil 1 but yet it's still not available in very many dealers, and the ones that do stock it won't sell it to the public, they will only use it in their service bay. So do it yourselfers like me have to wait a long time to get their hands on this oil, or like I've posted in other areas, look for a possible dexos2 alternative choice like 5w30 ESP or PP Euro L 5w30. Hopefully in a year or two there will be a few other dexos2 0w40s to choose from (are you listening Pennzoil?)