Firtsly, what are the symptoms and how was the cause diagnosed as piston rings?
Basically i was driving 2 days ago in the morning and noticed quite a bit of smoke from the rear i thought its normal and didnt see it again as i hit the motorway, 80 miles later i had misfire from spark plugs.
I then drove to the garage who changed out the spargplugs but by now there is loads of smoke present coming out the exhaust.
After spark plug swap took it for a short drive and realised it started misfiring again, So car got back to garage and pulled out plugs to see there is oil on the tip of the plugs,
The mechanic then pointed out that it is not a faulty turbo (What i thought it was originally) and that it is the piston rings.
This is the where I have come up to with the mechanic so i really dont know if he knows what hes talking about