Has anyone had to use the stellantis warranty for excessive use of oil. I had a new pcv valve fitted under this warranty but didn't cure the problem. Dealer now suggests a piston ring clean ( using an addative in the oil that doesn't effect the cam belt ) at a cost of £500. This they say is not covered as it is a procedure. Trying to find a number to check if this correct isn't easy. Anyone had a similar problem .