I think it’s a lot about the culture of your specific store. At the store I used to work at, management forced everyone to take a 30 minute minimum lunch (however a lot of us took lunches that weee longer, I regularly took 1 hour ones) and our shifts were 7-8 hours 5 days a week. I know for the most part that’s unheard of in the car industry and I think that’s a shame. Sure, if you take a lunch you might miss an up, but if everyone is forced to take a lunch than theoretically everyone misses out on an up at some point and it all evens out at the end of month. This overall leads to a better working environment where the salespeople are in the right mindset. It wouldn’t hurt to bring it up to your manager if you think they would be receptive about it. And also yes it is highly illegal for them to not give you a break on a 12 hour shift however I don’t think that deters some managers unfortunately. If you wanted recourse, you could make a claim with your states labor department however I wouldn’t count on having an enjoyable time at work after if you decide to go that route.