My 91 164 tspark has now done approx 155000 miles and still seems to drive really well however about six months ago I noticed the engine was looking a bit oily and that oil consumption had increased I also found some trace of oil in the expansion tank. I therefore assumes the head gasket needed replacing. Although I didnt think about it at the time I had recently started using synthetic oil, I have since reverted back to using a semi-synthetic and oil consumption has stopped altogether, there is little trace of oil in the expansion tank too.
What oils do people recomend? Have any of you come across anything similar? I am still concerned about the head gasket but intned to clean the engine off and flush the sooling system before I replace the gasket.