Car engine: cylinder problem, said they fixed it, why pay them to fix it again? Do I involve my lawyer?

About 3 months ago my car just stopped, it is under warranty so they took it in and fixed it. They said it was the cylinders, that they were leaking oil. (bear with me I don't know much about car's) I paid the $200 deductible, and got my car back after a month. Once I drove it off the lot, the exhaust was horrible! white smoke everywhere as soon as I start it or hit the gas. They said it would take some time to "work in" the new parts. (this is a major dealership, too) ok, so 2 weeks later, oil light comes on, it's completely out of oil! I take it straight to get an oil change, then back to the dealership. They are saying it's unrelated but it's the cylinder's leaking oil, but since it's "unrelated" to the first problem, I must pay the $200 again. The warranty company is saying it's unrelated, but the mechanic says it isn't, that it's connected to the first problem. Do I get my lawyer involved?