Hello. Ethanol or non-ethanol fuel? Ethanol fuel has cleaning agents in that will clean old tanks and move that junk towards the engine as well as deterioration of fuel lines. Ethanol fuel also starts to break down as soon as 2 weeks and has moisture drawing properties. Long story short, only use non-ethanol fuel. If your engine has fuel injectors, the last line of defense is the 10 micron filter in the fuel injector. More info available at RaceCityInjector .com We were down the road from you at Turtle Point this weekend chasing eyes