Okay, I have a 92 civic with a basically stock 97 gsr motor in it. Lately it was been smoking out the back when I get above around 3500 rpm. It's either white or bluish smoke, not quite sure. The car also overheats after a while if I do not run the heater. So I decided to check it out. I found out that I'm not burning any oil or coolant. There was, however oil in the spark plug tubes. So I changed the oil, spark plugs, and replaced the spark plug tube seals, thinking that might change something. However I am still experiencing the same problems. If anyone has any suggestions at what it might be, I would greatly appreciate it. I just hope it's not the head gasket. Thanks to anyone who responds.