We say bad batch of gas but what does it really mean? Does it have entrained water? Does it have higher than usual detergents? Is there a way to determine cumulatively what stations or brands have better blend consistency?

Do you see how torn to pieces I am when it comes to figuring this out? I just seem to want to dig deeper and answer more questions that the internet cannot provide because it’s full of useless info. Lol

Take it back to the shop that did your brake and ask for a complementary inspection with the wheels taken off. Any reputable shop that does such work would do so readily and through that you may get a complimentary piece of advice on what is wrong. I wouldn’t do anything or go anywhere until you do that. If the shop won’t investigate it free of charge the question is, what are you doing going to bum auto shops? 🤣

Jokes aside, have them look at it. Always start with the most recent change and work forward.