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Posts Tagged: E85

E85 Gasoline

What is E85 gas? E10 gasoline is 10% ethanol and 90% gas. So it’s no surprise that people think E85 is 15% ethanol and 85% gasoline. It’s not. In fact, it’s just the opposite. E85 Gasoline can be as high as 85% ethanol and 15% gasoline. However, E85 Flex Fuel is allowed to be made within a wide range, from as low as 51% ethanol, up to 85%. Ethanol is 105 octane. That means it is much more resistant to detonation (igniting from the heat of compression instead of the spark … Read More


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