I read the article. most ALL of it I already knew. This stuff below is a bit off....
"""" means wrong !!
One argument is that you should fill your tank up to the top and use it all the way down, because this is most efficient. Another is that you should fill your tank halfway up and use it all the way down because gas weighs 7 lbs per gallon and all that extra weight hurts your fuel economy. And another common perspective is that you shouldn’t let your tank get below ? full, because this requires the car to suck fuel out of the tank which uses electricity and thus, more fuel """"""". All these points are true, yet when you finally consider each aspect, the best conclusion I can give you is to fill your car up to ? full, and not let it get below ? full. This way, your car isn’t loaded with weight, """"and does not require the electrical pump from your fuel tank"""". Also, better octane gas will give you slightly better mileage indirectly, because of the smoothness of the engine and simply the quality of the gas.
And...This is just stupid info.....
While purchasing a car, note the EPA estimated mileage. However, don’t forget to subtract about 30% of that number, because of the silly methods that the EPA uses. You would have to drive naked in a giant room with no air at 6 mph if you wanted to match the EPA’s methods.
Everyone , including me, has gotten window sticker mileage, or better (if you drive sanely). ie: my camry said 30 mpg hwy. I went across country with the entire car filled with stuff, and drove 80 mph most of the way, and got 33 mpg, on regular gas.