I am new to this forum.
Yesterday, while driving on I94 I may have run over a nail and had a flat tire on rear drivers side. My Touring is a 2015 model with about 14,000 miles on it.
Being a Saturday afternoon, I had no option but to drive on my spare tire for about 20 miles to a Firestone tire shop. As I had to drive back home (150miles away), I decided to have my flat tire replaced with a brand new Firestone brand 99T speed rating tire as I wasn't feeling comfortable driving on a spare tire.
1) Is it still safe/recommended to drive my Touring with 3 Dunlop brand/1 Firestone brand tire?
2) The 3 older tires have 8/9 tread depth, having driven 150 miles (with a new Firestone brand tire) would I have done any damage to my car?
3) I still haven't seen the dealership yet, but I am worried that I may be shelling out money to have all four tires replaced in order to have uniform tread wear and no damage to transmission??
Any help would be appreciated.