I have a 1995 530i 5sp, Nikasil, 43K. Last oil change about 11 months and 5K miles ago I switched to Mobil 1 sythetic. I have not observed any oil leaks. My low oil warning went off a few days ago and sure enough, it was a quart low. Is this normal? Could it relate to the Nikasil problem? I think my idle has become rough. About a year ago I had the idle quality and the other priliminary test done. The car passed. They wanted me to pay for the leakdown. I elected to wait until a little before the warranty runs out with is February of 2002. Any thoughts or suggestions would be appreciated.