Gas: Winter-Summer Fuel Blends Explained 12-24-2010 - WNEM TV 5

Gas: Winter-Summer Fuel Blends Explained 12-24-2010

With the rising gas prices in Mid-Michigan, TV5 has had a lot of questions about the differences between "summer blend" and "winter blend" gasoline.
The difference between the blends has to do with how volatile the fuel is.
Summer blends of gas contain nearly 2 percent more energy than their winter counterpart. This gives cars a better mileage rating in the summer.
The switch between the two fuels happens in the fall and spring.
Experts say the summer fuel is typically more expensive to produce, but neither affects the durability of a car's fuel system.
Fuel is also less proficiently combusted in the cold months, leading to poorer gas mileage.
The recent rise of prices at the pump is more due to oil prices peaking over $91 per barrel.
This time last year, oil was below $85 per barrel. OPEC recently stated it would like to see the fossil fuel traded steadily at $100 per barrel.
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