I got bad gas over 2 weeks ago now and FINALLY got the weights and measure guys to sample the gas in my car. They said the gas had so much water in it they didnt know how i managed to drive it home 40 odd miles after tanking up. Good news is any damage gets paid for by those I bought the gas from.

Is there any special fluid or octane boost I should put back in the car once I drained the fuel out? And since its sat for about 2 weeks am I gonna have to worry about rust or anything? I was just gonna go buy a few gallons of 93 gas and use a bottle of injector cleaner I have laying around, is that good enough?

 

INjector cleaner won't help.

Use a bottle or 2 of 91% isopropyl alcohol along wiht just a couple of gallons of gas, which is just like rubbing alcohol except that it's 91 % instead of the usual 70%. Available at the grocery store and drug stores.

Chances are, there's no damage.

 

So you still have about 14-15 gallons of wet fuel? You'll need a lot more than a quart of alcohol to make the water miscible. A gallon would be more like it. And after you run all the fuel out, try to find a different station that sells an ethanol blended fuel to get every last bit of water out of the system. You'll lose about 1.2-1.5% in fuel mileage, but you'll also eliminate any water (and a lot of deposits that may have accumulated).

Whatever you do, DON'T use any fuel driers or additives that have methanol. Methanol has an affinity for lead and some elsatomers, which means that any solder at the tank seams, any brass or bronze fitting, any non-EPDM 'O' ring, any fuel hose or regulator diaphragm, or any soldered joint in the fuel rails might deteriorate and fail from the exposure to methanol.