Re: Fuel Tank Only Filling up to 7/8
It's true you shouldn't drive a car until there is less than 1 gallon of gas left. Not for sediments, but because the gas can literally slosh free of the fuel pump while it's trying to pull gas, and that's a great way to find yourself in need of a new one before long. Plus, you're trusting a computer to read 1/3 of a gallon of gas consistently as it splashes around, you could easily find yourself stranded.
The "sediments" argument is highly dubious. The gas tank is constantly stirred up while you're driving. How would sediments remain stationary until the magical final gallon? It defies any rational thought. Think of it like a snow globe, it's clear sitting on the shelf, but put it in your pocket as you go for a jog and see what it looks like after a mile or two. That's like your car constantly accelerating, stopping, and making turns.
Since buying my car, I've always filled up ASAP after the low fuel indicator comes on. I do that knowing I still have two gallons feeding the car, so no fuel pump wear and tear.
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2009 2LT V6 Red Jewel
w/Factory Fogs, Lip Spoiler, Black Calipers, Chrome-Tech 18s,
GM Performance STB, Amsoil Cone Intake
HPTuners - Tune In Progress (V4.12) - 14.36 @ 98 mph