Did a quick google search. found a couple of sites that seem to match your criteria:
http://www.ecarlog.com/
http://www.mycarprojects.net/
If you've got an iphone you might check this one out...
http://www.apptism.com/apps/gas-cubb...ar-maintenance
Can't says I've used any of these or have any recommendations but maybe one of these will work for ya.