ive been to tank maintenance classes for work, we have a few big diesel tanks we have to look after. but in class there were people who work at the stations and they just said you want to get gas at the larger places that have alot of traffic. because the gas doesn't sit long and it doesnt have time to settle the "others". thats why i get my gas in the city.i just get the cheap 87. ive always used no injector cleaner or any other nonsense and all my cars get the same mileage at 2-300k as they did new. never had to replace an injector either.

Well I really appreciate all the interest in this topic. I nevere knew that eth gas could cause mech problems until my sons Volvo engine wrecked. It was used but he'* had it for years. The mech is very good and deals almost entirely with Volvos. He blamed the wrecked engine on eth fuel, wrecked valves/engine. After repair-replace he said no more eth fuel. I've had a 02 Envoy since 04 and have used eth fuel since I bought it, without issues. But after his problems I went to my op manual and it says plain as day, no eth fuel. I find that interesting. It'* typical, gov controlling stuff they know nothing about. Eth fuel cannot be transferred through pipe lines, it must be trucked. It doesn't have a very long shelf life as gas does. We don't know how much of it actually is in the gas we buy, it only reads "at least 10% ethanol" on the pumps.

I just returned from a trip where I used a full tank of non eth. Checking the mileage with a calc, 30.825 mpg. The mileage calc on the car says my average over all is 27.4 and has read that since Ive had it. I don't know how accurate that is. I'll check this next tank and post it. I just don't believe we really "save" .40 cents a gallon to use eth gas. I would wager that using ethanol in our gas actually costs, overall, more than pure gas. With the diesel needed to grow the corn, manufacture the eth, transport it, not even considering the millions spent to repair problems caused by its use.

Charles, refer to your owners manual regarding the fuel mileage re-set on instant/average MPG etc.
Many of the modern ones may calculate a reset when u re-fill, but my Buick has to be re-set manually, otherwise it also will stay reading the same. I normally re-set mine for a highway run for instance so that the average fuel reading is more accurate on that trip.

I wasn't aware of that. I thought it was constantly calculating the mileage.

The instant mileage reading will be at time of driving condition.
The Average needs to be re set on my Buick to read properly, for a long highway trip, or city combo so that it reads more accurately. (re-fresh) once in a while.
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I want only No Ethanol Gas at the Pump! Car runs better!!