Let's cut right to the chase. Here is a copy of the 2010 Equinox( OP's vehicle and what sparked this current debate )owner's manual concerning oil changes. It is VERY specific about what must be done for warranty coverage...
Page 1:
Page2:
1 - use an oil that "meets" GM6094M( not certified but "meets" - this is where MMA plays in with meets/exceeds - mfg's own standard not 3rd party like API so does not have to be certified )
2 - use 5W-30( specifically states DO NOT use other weights )
3 - API Starburst( specificallly states to use an oil with the Starburst - no "meets" mentioned - says use an oil that carries the Starburst - to do so it MUST be certified! ).
4 - Specifically spells it all out at the end. Nothing amiguous about it...
Notice: Use only engine oil identified as meeting GM Standard GM6094M and showing the American Petroleum Institute Certified For Gasoline Engines starburst symbol. Failure to use the recommended oil can result in engine damage not covered by the vehicle warranty.
5 - As to mileage on THIS vehicle please see page 2 from above. GM now uses the OLM or 1 year. There is no longer a max month/mileage clause. So, the OP actually could get away with going a year IF his OLM allows for it. If the OLM tripped before the year was up then the oil needs to be changed technically.
It is possible that, if driving under the best conditions, the oil life system might not indicate that an oil change is necessary for over a year. However, the engine oil and filter must be changed at least once a year and at this time the system must be reset.
NOTE - page 2 ends before the lastf ew words about the year clause. I am not attaching page 3 for a few words. Page 3 had this...
once a year and at this time the system must be reset.
Now, lets use my truck( 2008 Ram 1500 )as an example of when a mfg is specific about a time frame. My truck has an OLM as well and Dodge does say to follow it BUT they add a clause stating never to exceed 6 months/6000 miles on any oil change. So even if the OLM has not tripped once I hit 6 months or 6000 miles I have to change it( I am not copying the manual page for this - people can believe or disbelieve as they see fit ).
I have never come across an owner's manual that didn't just spell it out for you. Now granted I am talking limited mfg's here( Chrysler/Dodge, GM, Ford, Toyota )but they were always clear.