Hello there,
Here are some of my ideas. I wanted to stick to very recognizable auto parts and something that would look fine in small print. I chose to use the connecting rod and piston as the "T" and the connecting rod cap to form the "O". Also tried to play with a gasket to frame the logo. I was unfortunately unable to get all the designs in time before the contest's Open Phase ran out. Please feel free to request any changes, be it colors, fonts, parts...
Keep in mind that only the designers in Top 5 Designer will be able to keep working in the contest, so depending on how they are ranked, they will be able to submit or not.
Thanks.
Marcelo