the gsi is losing oil. can't c ne major leaks.heard it could be in need of a gasket change tho
How much oil?
Any smoke from exhaust? Have you checked the oil cap for any 'mayo' to see if water is mixing, i.e head gasket failure?
personally i aint heard of many head gasgets going on the z20let but you never know. The trubo is a common one to go.
do what is sead above first tho!
AOC top 15 car at PVS 2009 & 2010313.7bhp/343Ibft
mine had a slight leak from the turbo. i got a bottle of oil seal rejuvinator from halfords. worked a treat!