hello and welcome to the vxzoc, rhino..
generally check for blueish smoke coming out of the exhaust ,signs the the turbo seals may be on the way out...check for general oil leaks around the top and under the turbo...check for leaks, around the rocker cover..ask when the cambelt was last changed,, should be approx every 40000 miles...havent found anything else majorly on mine or heard of many other faults on the zaf gsi at all...