Weight reduction: not filling the gas tank
 

Yup, about 6 lbs per gallon IIRC. When not calibrating the SuperMID, I only have 6 gallons max in my 11ish gal tank. That is about 30 pounds savings. I also have my windshield washer solvent at 1/2 tank max.:D

I love it. Are you running half-tanks now, or are you still calibrating the MID with the VX?

I think 6lbs/gal is what I turned up most in a recent search I did as well. Which actually makes fuel the single heaviest easily "removable" item on my car. 10.5 gal tank = 63 lbs. Spare & jack = 24. Passenger seat = 29.

how much difference does 30lbs really make??

for what its worth, i skipped breakfast this morning. figure it was worth a couple of pounds.
:)

The difference is likely too small to measure reliably with FE instrumentation in a test scenario. But it's real, and every little bit helps.

However, this kind of discussion is probably an example of how we apparently cultivate the impression we're Screwballs.

I'm calibrated and running half tanks now. Can't say it it makes a difference. Can't hurt though.:p

Is dan back from retirement? Retirement meaning the beach.

I make up for full filling my by just running it 50 miles after the fuel light comes on!

Modern cars are supposed to have closed systems. No fuel should evaporate to the outside, so you don't "lose" anything. Fumes are combusted via the evaporative emissions controls.

I just go from F to E. I fill it up till it clicks (so I can track my mpg) and then ride till E (aprox. 9-10gal). If I do half fills it throws off the whole one click fill up thing.

The only thing I've heard about too little gas is from lubedev/smartgas. He claims that all the water in that air will collect in gas and ruin your mileage! Logical, no?