Zaphodb17

I'm not sure exactly why it does it, but I've had 2 incidents where a clogged fuel filter KILLED my fuel mileage and power. Caveat: only had it happen on fuel injected cars, never experienced it on carbed cars. I picked up a load of fuel at a station where a tanker was delivering fuel and almost immediately had power loss. Then I found that the vehicle was almost out of fuel at about 2/3ds the normal range. Suspected a contaminated fuel filter and when I pulled it, found it pretty much plugged. Changed it out and power and economy went right back to normal. I have no idea why the fuel economy suffered so much with a plugged fuel filter, but I definitely did not imagine it. The same exact thing happened to me when the catalytic converter plugged on me on 2 different vehicles. This I could understand a little better; no power=push the accelerator further down, use more fuel, I guess. The key to it all? Never get fuel where they are delivering a load to the underground tanks. I guess there is so much crap in a mostly empty storage tank that when a delivery happens, all of that gets stirred up and delivered to YOUR tank.

lucio_liu

very true.. always avoid filling while seeing a tank truck. one tank dirty gas could be more than enough to kill a fuel filter.