it was done under warranty from garage where bought. what happened, we were driving down a dual carriageway decelerating to a roundabout when the engine noise just changed to kind of a misfiring sound ( like 3 cylinders) under the bonnet it was quite smokey and there was also quite a bit of smoke from the oil filler cap so we called the aa and got it towed. before this the engine lost power on 1 cyclinder. thanks