1998 Buick Regal Owner's Manual - Page 259

I A CAUTION: Never use oil or grease on studs or nuts. you If do, the nuts might come loose. Your wheel could fall off, causinga serious accident. Replace the wheel nuts with therounded end of the nuts toward the wheel. Tighten each nut by hand until the wheel is held against the hub. 9. Lower the vehicle by turning the jack handleto the left. Lower the jackcompletely. 5-33