I had a discussion with one of our AAA members the other day
about the manufacturer-recommended oil change for her 2011 General Motors
vehicle. The owner’s manual said to use Dexos1 or equivalent. After doing some research and contacting my friends
at Valvoline, I learned that GM has developed an oil that it recommends be used
in most 2011 and newer GM vehicles. The problem is, unless the member went to
the dealer for her service, no one else had this Dexos stuff.
Which begs the question: What is the definition of “or equivalent”? Technically, the
definition is any semi-synthetic oil that is GF-4 rated, 5w-30 with an API
starburst on the label.
It seems this move by GM accomplishes two things. First, it
almost sounds like you have to go back to the dealer if you want to keep your
warranty in effect. (But we know the Magnuson-Moss Warranty Act doesn't allow
for that—hence the or equivalent disclaimer).
Second, GM will receive licensing fees and royalties paid back to it for the
use of its oil. Ah ha! The revenue stream!
While I have no problem taking my vehicle to the dealer for service and
warranty repairs, I suggest you read the recommendations in your owner’s manual
thoroughly, if for no other reason than to make sure you are putting in the
recommended oil...or equivalent.