Despite the complex array of motor oils offered under the Mobil-1 name, and the complicated way they are laid out on Mobil's website, Mobil has at least offered a Mobil-1 "Oil Product Guide", which is a pdf, available from several different links on the various Mobil-1 sub-pages on their site. It offers basic info (the Zinc and Phosphorous levels are nice to see) on each of the oils Mobil sells under the Mobil-1 name. It's currently five pages long. You can see the Oil Product Guide here. The Mystery? Look at the last two lines on Page 3. There you will see described two viscosities of an oil called, "Mobil 1 Turbo Power", with the viscosities being 0w-20 and 5w-30. Unless I'm having a complete brain dump, I see no other references to these two oils anywhere on the Mobil sites and pages. Of course, I searched here on BITOG, and found nothing. Even Google comes up with nothing. I'm at a loss. Are these old oils I just never heard of that are on their way out? Are they new ones on the way in? Maybe not offered in North America (then why listed...). Does anyone know anything about these two mysterious (at least to me) flavors of Mobil-1?