LF4472
Seasoned Member
The reason for the 500 mile change on 2016+ later cars is the same as the pre-2016 cars: breakdown of the anti-foaming agents. The quote you mentioned for the 2016+ just isn't calling out what the specific contaminant is (the silicone sealants). This post has a good overall of the issue.I know that we are really straying off the OP topic talking about Corvettes (sorry again OP), but I only agree with your statement for cars built after 2016; however, cars that were built before 2016 GM released this statement below. My 2016 Z06 was an "early 2016" that was built in 2015, so GM told my dealer to change my oil due to the issue below of foaming that I was seeing. Later year models, GM released a statement that dry sump cars were required due to "break in contaminates." See after below for that one as well for 2016+ dry sump. I bolded everything to make it easier to find.