Spark Plug Seals Set of 4 - Mitsubishi Colt CZT 1.5 4G15T Turbo Z37A Leaking oil from around ceramic part of plugs then these are the culprit. Genuine Mitsubishi Parts
There are 2 of each type fitted to the CZT Engine see Exploded Diagram HERE
Mitsubishi Part Number MD377813 x 2 MR994294 x 2
