Skoda Octavia scout 2010 1.8 tsi oil leak

Engine management light lit up then ecp went on. Took her to a garage and they said oil gets into combustion chamber in one cylinder only. I am considering using oil additives and the preferred one is Ametech RESTORE engine restorer. It is ok to use in all engines apart from VVT or VVTi engines according to the maker.

How can I find out if it is VVT and if it is can you help suggesting any other oil addotive? Need to stop or limit oil getting to combustion chamber. Any other solutions? Thicker oil with higher velocity to slow the leak down? Any ideas or suggestions apart from getting new engine ? My mechanic renewed spark plugs and oil filter as temporary measure but it will not last.  Cheers