Don't get me started, I was busy and didn't feel like messing with the brakes on my car, so I went to [insert name of national tire mfr/service chain] and told them that I wanted the brakes done. So I'm sitting there waiting and I see my car drive by and out into the street. So I ask the guy at the counter what's going on, and he says that it's standard for them to take the car for a test drive before they work on it--so I tell him I know it needs brakes, and I just want to get that done, and they don't need to be checking out my car beforehand; he told me that's just their normal practice. So the car comes back, they put it on the lift, and tell me I need brakes (duh), and oh, by the way, when the technician was driving my car, he noticed that the windshield wipers needed to be replaced (it was a completely dry, sunny summer day, and of course the wipers were fine anyway). I just looked at the guy and said "You're kidding, right? I come in here for brakes and you're trying to sell me windshield wipers? Do people really fall for that? No, I don't want windshield wipers." He was basically speechless. (Before you guys start on me, I know that's a standard upsell, but please, they should save that for the housewives, it's not going to work on me)
Oh...and I generally try to stick to the standard drain interval even when using Mobil 1, both for warranty purposes, and because I look at it as an extra insurance policy...I don't put a lot of miles on my cars, so the extra cost isn't a huge amount of dollars for the added peace of mind.