Turbo has failed three times - do I have any comeback against the dealer?

I bought a Citroen C4 with a broken turbo and got a new one fitted with warranty. However, the new turbo failed within 10,000 miles. Another one was fitted under warranty, but less than three months after the warranty expired, the replacement turbo has failed again. What come back could I have?
Probably none. The reason why turbos fail, then the replacements fail, is that the turbo bearing oil feed and oil return pipes are partially blocked with carbonised oil from switching the engine off when the turbo is very hot rather then idling the engine for a minute to keep the bearing lubricated and the pipes free of carbon while it cools slightly. The consequent restricted flow of oil to the turbo bearing gives it a short life.
Answered by Honest John on

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