Entry #14 is my favorite. I like the green and blue combination. The font is good as well. See if you can alter the avatar. I like the avatar in Entry #15 slightly better
I really like your Oil Optimizer and Weldon Works. Can you incorporate some of those elements into our design (ie: eye catching 'shiny' look, Incorporating two W's into your design, the oil drop and gears in the Oil Optimizer design.