Yes, GM has now made that standard to meet the minimum requirements for blended oils. This is the reason they have created DEXOS.
The last time i checked, it does
The General Motors oil specification in question, GM6094M, denotes specific loads and temperatures to be met in the test lab.Independent research has not uncovered the specific goals of GM6094M, but quickly showed that many synthetic and mineral based oils meet the requirements, so there is nothing too exotic about this engine oil requirements. Both Havoline (mineral) and Redline (synthetic) 5W-30 oils meet this specification, for example, so a number of oils should work. From an older post on GM TechLink website, here is a list of oils that met this spec (circa 2005): http://forums.genvibe.com/zerofile/7142/synthgd.pdf
The equivalent of GM6094M motor oil is typically a synthetic oil that meets the specifications set by General Motors for certain engines, especially those requiring a high-performance oil. Common alternatives include oils that conform to API ratings such as SN, SM, or later, and may also meet ACEA or ILSAC standards. Always check the product label to ensure it matches the required specifications for your vehicle. It's also advisable to consult your vehicle's owner manual for the best recommendations.
In order to ensure if you can mix these two syn oil, you should carefully check the base of each oil (cross check the oil formular). If you find they have same oil-base, you can mix it
You can mix part synthetic oil with full synthetic oil.
Semi synthetic or synthetic blend is a combination of synthetic and conventional oil. Full synthetic oil is just that 100% synthetic oil.
Oil that comes out of the ground is not synthetic but is called crude oil. Synthetic oil is man made with synthetic compounds. They are both oil.
5W/30 synthetic oil is best, conventional petroleum base motor oil is acceptable but inferior, Brand does not matter with full synthetic, but beware, many are blends
3000 miles if using regular oil, 6000 if using synthetic. I use synthetic for my RSX-S, but regular would do for a base model.
Synthetic oil manufacturers.
Yes, Synthetic oil is synthetic oil no matter who makes it.
Yes, that is what a synthetic blend is that they sell.