Hi,, I just bought a serpent off of ebay,,the car came in today. Its in A+ condition, but in the bottom on the fuel tank was just a little little bit of fuel,that is blue in color(I'm thinking its Blue Thunder). I use Sidewinder,,will that little bit of fuel in the tank mess anything up when i put in the Sidewinder fuel in it? He told me he ran 20% in the car,, and the fuel i have is 20%. Also is it possible to mix to diff brands of fuelat the same %,,and could you mix to diff fuel brands of Diff. %? I know these are newbie questions,, but just wanna be safe.