After long time search I finally found this discount code and bring it to you as fast as possible before it expires. 10$ worth the code is: flossuccess09 and can be used at the Thinkgeek gadget store. Just enter the code in the checkout page after address submit and choosing shipping method (see photo for example).

If you not sure what is Scangauge II and how it can help you with driving habits and fuel consumption check my Scangauge review page.

Use it before expire!