Quote:
Originally Posted by atrick
I think the gas mileage going up and down has a lot to do with how the stations have their gas pumps calibrated.
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It takes more fuel to produce the same amount of power, when Ethanol is used, and although some pumps advertise up to 10% added, various stations across the US have been found to have more.....staggering amounts more.
E10 is supposed to only be 10% Ethanol. The government wasnts to boost it to E15, but car mfger's are asking for more testing. GM is already seeing a trend of 2-3 year old vehicles with failing fuel sending units, due to up'd corrosion levels in the gas tanks, due to more water, attracted by the Ethanol.
There's a simple method to testing your local station's Ethanol amounts:
1.) Get a graduated glass tube with 100ml.
2.) place 10ml of water in the tube.
3.) fill remaining 90 ml with gasoline.
4.) Let stand.
The Ethanol is hygroscopic and will bond (attract) the water. If the gasoline is 10% ethanol, your graduated tube will now read at the 20% line, on the bottom (water heavier then fuel) where it orioginally had 10ml of water. (10% water, bonded with 10% Ethanol = 20ml)
If it's HIGHER, (Over 20ml) you're getting a higher percentage of Ethanol then stated.
This is a crude method, but effective. Official kits are available, but run about $24 a piece.
You can buy the graduated tubes on Ebay. They're not expensive at all. I recommend using a glass tube.
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