1998 Buick Regal Owner's Manual - Page 277

Checking Engine Oil Pull out the dipstick clean it with a paper towel or and cloth, then push it back in a l the way. Remove itagain, l keeping the tip down, check thelevel. and The engine oil dipstick handlethe yellow loop near is the frontof the engine. few minutes to Turn off the engineand give the oil a drain back into the oil pan. If you don't, the oil dipstick might not show the actual level. 6-13