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I'm perplexed because it always falls in line with how the economy tends to be doing.
Originally posted by TheRedneck
reply to post by Ajax
Same gas station each time. And I've tried to isolate virtually every factor that could be causing these drastic swings. It definitely lines up better to oil prices and the economy than it does the seasons.
A lot of gas stations, especially locally-owned ones, buy their gas from a small distributor, which in turn buys from the lowest priced suppliers. So the same station may have completely different blends/octane ratings from one week to the next.
Check the octane rating labels sometime on the pump (not the signs, but the inspection stickers). They specify a minimum octane rating as opposed to an exact one.
Originally posted by MissPoovey
I am not saying your theory isn't possible.
My Ford F150 'talks' to Ford. I can run a dianogstic and the truck will send it to a server that sends me an email with the results. Programing that system to do other things would not be that difficult.
Not since the system can go on line by itself already.
I think your gas mileage variances have more to do with evaporation.
Gasoline evaporates very quickly and easily.
Just pumping gas in the heat of the day vs cooler times will make a difference.
Once your tank is less full the faster the gas will evaporate in the hot sun just while parked at work. Which is why letting your gas tank run empty will actually make it more empty... if that makes sense.
How fast you pump will change the evaporation rate also.
What I am saying if you let your tank run empty. Pump your gas in a hurry during the hot summer lunch break. Then the next time you take your time, early on a cool morning, while drinking your coffee on the way to work. That will make a difference.
I don't believe it would make enough of a difference that you are seeing.
However if you add the other thoughts from previous posters to this, it may add up to the differences you are seeing.