But then again I bet anyone who knows you in person would probably let you win to avoid pissing you off
ANyway, I remember racing a V6 a few years ago on the highway and we were right next to each other up to 100 or something. We got off on the same offramp and he gave me the smart ass comment about how I should have won with a GT.
As far as dirt in the tank goes, it generally won't do any harm but clog your filters so I would AT LEAST change the fuel filter. I would go so far as to remove the pump and replace the mesh filter too.