I'm wondering if this looks like cosmetic damage to you.
Damage to the sidewall near rim happened about a year and a half ago at around 20 mph. Tire has been holding air as well as the others over the last 4k miles since damage -- total mileage on tire is 7k and it is 3 years old.
The scrape is not very deep but it is long (see second shot with finger pushed against deepest part). Dealer thought it was cosmetic. Its been fine for the last 1+years but not sure how it will fare with 5 hours of driving for two weeks straight on an upcoming road trip.