There was a great thread about this with a poaster talking about growing up with his bros, playing cat-and-mouse with local cops and using dyed diesel in their trucks, and being "known for their clouds"

EDIT

http://www.autoadmit.com/thread.php?thread_id=3342826&forum_id=2#31345052

This is really going to piss off shitlibs but if you were to pull up behind my friends in HS in a foreign car their was a 90% chance you were getting rolled.

And to further piss off shitlibs (and to confirm my mega prole roots) I had two buddies who installed slip tanks in their beds and ran a separate fuel line they could engage with a dashboard switch. They would fill up the slip tank with red dye (untaxed, less clean gasoline) from their farms for two reasons: 1) red dye is cheap as shit and 2) it rolls hard as fuck. Of course this was illegal as fuck and one of my bros got pulled over for rolling and got a fat ticket for using red dye (this is a $7k ticket btw). After the cop wrote the ticket he made the cop dip test his fuel tank and of course it came back clean. The cop refused to take back the ticket (not a lawyer and not sure how that would work) so my bro took him to court and won. Of course the cops can also run an emissions test on the spot, but that's what the switch was for. Most of us would get tested for red dye because we had a rep around town for our clouds

(http://www.autoadmit.com/thread.php?thread_id=5910275&forum_id=2#50174635)