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We use teflon lined SS from Aeroquip.We drain the aluminium fuel cell after every race and run some gas with top oil through the fuel system if the cars is going to sit for awhile.The issue we see is that the aluminium fittings tend to oxidize from E-85 or alcohol.

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Thanks, Bob I'll have to do that also, I've already seen the E85 atack the aircraft quality thread lube I used on the fittings before finding the hose and pump leaks, no usage other than filling the sytem to check for leaks What top oil do you like Bob?

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Marvel,STP or most any brand you can get,mix it with some gas.Menthonal and ethynol as well as some octane,oxygenated fuel gather moisture and create the oxidizing to the metals.Darryal Franks bought some 116 oxygenated fuel and left it in the car over winter at our shop,in the spring it looked like solid white crystals formed in the carb and fuel system.