Hello! On my Google Webmaster Tools I have one warning. This is: All the URLs in your Sitemap have the same priority. All the URLs in your Sitemap are set to the same priority (not the default priority). Priority indicates the importance of a particular URL relative to other URLs on your site, and doesn't impact your site's performance in search results. If all URLs have the same priority, Google can't tell which are more important. What does this mean? My site is www.carspartsforsale.com
It is not a very important warning. When you submit a sitemap you can set each page to a different priority. This can be helpful if for example you want your main honda page to have greater search engine weight instead of your honda civic page. I personally don't use those settings and instead leave it at the default priority.