This is the code for the Automotive.com gas price widget to add to your site. It seems their page is broken and I tried contacting them. The widget works fine though. To set the widget to pull gas prices for your city, simply replace the 5 digit zip code where it says simZipCode = (make sure to leave the semi-colon at the end).
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<!-- Automotive Gas Widget -->
<div>
<span>Powered by <a id="sim-gas-link" href="https://justpaste.it/redirect/n0a/http%3A%2F%2Fwww.automotive.com%2Fnew-cars%2F" title="Automotive.com">Automotive.com</a></span>
</div>
<script>simZipCode = 92606;</script>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.6.4/jquery.js"></script>
<script src="http://affddl.automotive.com/widgets/gas/1/gas160.js"></script>
<!-- End of Automotive Gas Widget -->
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