Originally posted by swartlkk
This is VERY wrong. Ethanol not only burns more completely than 100% gasoline, but it has more natural lubricating elements in it that extend the life of your injectors and pump. It also keeps your fuel system very very clean.
The main gripe with ethanol blended fuels is because of their cleaning properties. Ethanol will dissolve water and clean out your entire fuel system including anything built up in your tank. The crap in the tank makes it's way to the filter and very quickly clogs it. Run ethanol blend for 2-3 tank fulls, allowing it to get as close to empty as you are comfortable with, then change your fuel filter. Also, if you run ethanol blended fuels, then you basically never have to run a fuel system treatment. Read any fuel system treatment bottle and it will list ethanol as a main ingredient!
I run Sunoco fuel in my car ever other fill up. However, when I first started running it I did notice a decrease in mileage and was instructed to change my filter after the first couple of tanks. As stated above, the ethanol has NOTHING to do with fuel mileage drop, it is the crud that the ethanol releases from your tank clogging the fuel filter that causes a decrease in fuel mileage and performance.
I am getting around 24 mpg on my 50 mile (on way) commute and that is with ~20 miles of sufface streets with 13 stop signs and 3 traffic lights and ~30 of NYS Thruway @ 80 mph. And my 'trep is no spring chicken at 161,xxx miles and nothing major done to the engine, EVER. So don't go saying ethanol blends decrease fuel mileage.
Ethanol has a lower energy density than Gasolene does.. and even the car manuals say that the 85% ethanol fuels will give significantly less mileage than regular gas (I read this in a 2003 FFV stratus manual). If 85% ethanol has less mileage, so will 10% ethanol. that is just common sense.
Also.. ethanol is NOT a natural lubricant. Ethanol is just that. Ethanol: CH3CH2OH. As all Alcohols are, they are good cleaning agents, and kill bacteria. they are also Clean burning, and not considered "explosive" (they burn slower than gasolene). It is Harsh on Rubber and organic materials (like paper in fuel filters), and cause plastics to become brittle (as in the parts in your fuel injectors) Ethanol also can be harsh on certian types of metals, due to that little oxygen hanging off one end. (this can cause problems on piston rings and when it gets in by the oil due to blow-by).
I have experiance with this ethanol blend.. as the gas in Eau Claire doesn't have ethanol, and the gas in Milwaukee has ethanol. there is a very noticeable difference in mileage.. being upwards of 5% (1-2 mpg).
What you say about ethanol that IS good, is that it does allow water to mix with gasolene, and be "burnable" by the engine without causing it to stall out. This is great for us in the north because every so often the cold weather causes condensation in our gas tanks.