The car was periodically "bucking" on me, and would sometimes conk out, and then start back up shortly after, and then the check engine light would come on, but not stay on. I took it to several mechanics, and they all said it had to be acting up at the moment for them to figure out what is wrong. I took it to this certain mechanic several times, because they have changed my oil for years, and they are nearby. I left it there again for them to ride around in it briefly to see if it would act up, and it wouldn't even start for them. They figured out it was the ignition coil, ignition control module, and the distributor. They also found that my coolant temperature sensor was bad. So they had it for a couple days, and call to say it is ready. It cost almost $1,000 to fix. I drive it home, and when I would accelerate I would get these loud pinging clicky noises. I take it back, and the owner has one of his guys drive it, and he comes back and says it's another bad distributor. The owner tells me the first distributor they put in was bad, and this was the second one. He tells the woman behind the counter (his wife) to order another one from a different manufacturer. They tell me to come back the following Monday. He ask me on my way out what kind of gas is in my tank, and I say 87 octane. He says the car takes 93, and for me to drive some of that gas out and put in 93, and see if it takes care of it. I tell him my car has always taken 87, but I'd put in some 93. It does make the pingy sounds go away some, and I tell him this when I go back the following Monday. He tells me he thinks I was able to drive on the 87, because of the broken coolant sensor, and if I want to put 87 back in, he will put the broken sensor back in. He says there is nothing wrong with the new distributor. I tell him my car has always been able to drive on 87 gas, because it takes 87 gas. He starts getting animated and loud, and screams that my car has an LT1 Corvette engine, and those take 93 gas. I tell him my engine is not the same as a Corvette engine, and it is a small block engine that was built for B-body cars like mine, and it even states it in my owners manual that it takes 87 gas. I tell him putting a broken coolant sensor back in my car is not going to make me get 87 gas. He throws his hands in the air screaming again, and says it isn't worth explaining to me, cause I won't be able to understand it. I say try me, and not once did I raise my voice to him. He runs in the back, and returns a couple minutes later and slams a piece of paper on the counter in front of me, and screams THE FEDERAL GVT SAYS LT1 ENGINES TAKE PREMIUM GAS. I look at him and tell him the one out in his parking lot doesn't. I again tell him that not all LT1 engines are the same, and my car is not taking the 87 gas, because the distributor he put in is bad, and the 93 gas is just masking the problem. He says I can come in on Friday so he can put the broken sensor back in to get the 87 gas or just leave the car as is. He goes back to work on cars. I look at his wife and tell her that I did not come there for a confrontation, and that when I brought my car in to be fixed I got 87 gas, and when I came to pick it up it didn't take that gas anymore, and it was pinging badly. She said he was having a bad day and he took it out on me. I go out to my car, and bring in the owner's manual and show her where it says it takes 87 gas. She says it isn't the distributor, and that it is the bad sensor, and that she will see my Friday if I want him to put it back in. I was calm during all of this, but inside of me I was fit to be tied, and I was not going to be taken advantage of, or settle for what I know is some of the dumbest #### I have ever heard coming out of a mechanics mouth. I left and drove straight to the Buick dealership, and I talked to a couple of service technicians. They said the owner's manual should have been enough evidence that my car gets 87 gas, and that not all LT1s are created equal. They said if he put in a distributor and my car isn't taking 87 anymore, the distributor is bad. I asked them if they would call the mechanic shop, and they said they couldn't get involved, and that the situation sucked. I called the mechanic shop and told the wife that I went to the Buick place, and I told her what they said about the car, and she said she would talk to her husband. She called me yesterday and said to bring the car in Monday, and they will put in a new distributor. I hope they got one from a different manufacturer, and this one will be good. I don't trust that the mechanic knows what he is doing. I hope for the best, and I wonder what his behavior will be when he sees me. He was such a ####### ####### to me, and he was the one that was wrong.