This recipe
http://cakecentral.com/recipes/7521/cinnamon-swirl-cake
calls for 1cup water AND 1cup oil. Seems like too much liquid to me. Any thoughts? Suggestions? Should I just make the cake as directed on the box (adding in the pudding, of course) and then add the cinnamon swirl bit as suggested in this recipe?

Here's the same recipe:

http://www.cooks.com/rec/view/0,196,153191-248202,00.html

Here's one that uses less water and less oil:

https://community.tasteofhome.com/forums/p/272928/3520239.aspx

HTH