2000 civic LX. Fluid never needed to be topped up. It was changed after two years in 3/02, then again in 3/04. At each change there was no noticeable lose of fluid during the preceding 2 years. It was checked on 11/22/04 and showed no lose. Then on 12/26/04 it was checked and the stick was dry. The car was level. It was topped up at this time and has shown no signs of lose since. Any ideas what's up? thanks, paul