I'm probably the devil's advocate in reviewing this despite different experiences. However, I also realized that the reviewers here are not reviewing the actual service of these technicians.
I came in because I had a low tire pressure from the recent floods. I asked if he can fill my air to 35 psi so that the light can turn off. The technician did exactly that. And then I asked him how much his service was. He responded that it was free! But I couldn't walk away not paying for any service so I tipped him a couple of bucks even though it took no more than 2 minutes to fill all the tires up.
Please fellow yelpers, they may or may not be owned or managed by that gas station store, but give some credit to the technicians. They do their jobs.