Hi Rafa,
You might want to consider using a spell-checker before you post, since it makes it difficult for people to understand what you're asking, especially given that many of our users do not have English as their first language either. Please use the 'Preview Post' function and read through your posts carefully
before submitting them, in order to minimize the number and ferocity of your typos... On a more general note, it's really not necessary to open a new thread for every random topic or question that pops into your head. Try searching on the web first...
Presumably you meant 1) "Can you boost the power (octane rating) of your gasoline by adding naphthalene balls to it?" and 2) "Can you use eggs to prevent a radiator leak?"? Both questions can be easily answered via a simple search on Google...
1)
http://www.newton.dep.anl.gov/askasci/chem00/chem00485.htm
2)
http://www.4x4review.com/tech/radiator.asp
Google is your friend... 💡