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Originally Posted by xcel
___Jerome, there is a difference between Winter Oxygenated and Summer Oxygenated fuels. Both may have upwards of 10% ethanol (that is what we have here in the Midwest) but the winter blend has even more Oxygenates which reduce ones FE by anywhere from 2 - 5%. The 5% number came about from one of my own actuals on 10/24/04 on a second tank of the garbage. 70 + degree temps and a nice tail wind over the segment distance. This 108 would have been an easy 112 - 114 using non-Winter blend 10% E
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I hadn't thought about summer blend. I know that in all actuality, pure gasoline is only some kind of fraction of what the total amount of liquid we call gas is that we put in our cars. I am aware of the fact that significant amounts of detergents, anti gumming agents, rust inhibitors, etc. is mixed into auto fuels in addition to actual gasoline. It is pretty typical that most gas stations indicate that their fuels are oxygenated this time of year, usually by placing a sticker on the pump next to the octane rating sticker or just below the fueling handle. But when spring/summer rolls around those stickers disappear until the next fall/winter. I wonder if I just haven't been observant lately.
Thank for the insights.