[MetroMPG]

I'm torn between wanting to calculate my actual fuel consumption (by doing a complete fill up) and wanting to minimize weight (by doing more frequent small fills & then relying only on the SG to tell me my FE).

If I could easily remove fuel from the tank after filling up, I'd keep it in gas containers and add it back as needed until the next refill.

I've tried syphoning from this car's tank before, however (when I bought it - to remove the 7 year old gas that was in it), and I couldn't get a hose into the tank. Ended up having to get under the car & remove the filler pipe from the tank to get the tube in.