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Old 02-16-2012, 01:22 PM
11bighornblue 11bighornblue is offline
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I heard about winter blend and summer blend gas. Winter blend has more stuff in it to make sure water dont get into your gas. Therefore less MPG's in the winter. I understand the foot pedal thing. I have found a "sweet" spot on my truck to where I can put the pedal in that area and get the best MPG's. The weather has been warmer here all week and I am getting better MPG's. I am starting to think how cold it is is huge on depending what the MPG's of my truck gets. I hardly drive agressively on the Highway (which is 90% of my driving) So I can say it is not me changing how much my truck uses gas.
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Old 02-16-2012, 01:39 PM
anoldbiker anoldbiker is offline
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Summer blends verses winter blends are quiet different. But fuel vapor pressure is important. During the summer the refineries have a large stock of Ic4's because they cannot use as much as they would like in gasoline blends, raising this pressure to much. During the winter they can increase the amount to increase the vapor pressure and still be in specs. This causes the blend to be lighter. They expend the excess products they fight to store or use for other products and we pay for it. This can also change the burn energy of the fuel and can change mpg's. There is a lot more difference in them, but this is only one reason your mpg's can be different during different times of the year and in different parts of the country.
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