Oil line connectors

[MadMarx]

Hello,

my car has many oil lines and also a lot of aluminm connectors and some of the them do leak.
Is there any trick to seal them?
I think that I have tighten them enough and hesitate to tighten more not to destroy them.

Is there a seal missing in those connectors?

http://ecx.images-amazon.com/images/I/41P918-F13L.jpg

Just an exsample what I mean for the system.

Cheers
Chris

[Jim Stabe]

Is this what you are looking for? Google is your friend.

http://www.aircraftspruce.com/catalog/hapages/del37fittings.php

http://www.flaretite.com/flaretite.php

[MadMarx]

Thank you for these links.
I didn't know the proper word for these seals.

Have a good slip to 2015.