E10

Following years of debate, the EPA said earlier this month it will study the possibilities of cutting the amount of ethanol in the United States' gasoline supply. Since 2007, the Renewable Fuel Standard (RFS) has required growing amounts of ethanol to be blended into U.S. fuel supplies, with...

Since 2007, the Renewable Fuel Standard has required increasing levels of ethanol in gasoline blends sold in the U.S. Most fuel stations across the United States no longer offer pure gasoline, with E10—a blend of 10 percent ethanol and 90 percent gasoline—prevailing. After years of...

The EPA expects demand for ethanol-free gasoline to gradually dissipate.

A new House bill would cap levels of ethanol blended with gasoline.

It's all about the asterisk, it turns out. Most buyers likely assume that the conditions for rating a new car's fuel economy and engine performance are identical. For at least one carmaker--Ford--and possibly others as well, that turns out not to be the case: Different gasoline formulations are...

Only seven states require ethanol to be blended with gasoline.

The USDA will match state funding of "blender pumps" for ethanol.

The addition of ethanol to gasoline has now been a political hot potato in the U.S. for more than a decade. Joined by cosponsors from both sides of the aisle, U.S. Representative Bob Goodlatte [R-VA] introduced two bills in February that together would eliminate the Renewable Fuels Act passed in...

Few topics get our commenters more riled up than ethanol. Both sides weigh in with fervor and passion, debating energy security versus agricultural policies and costs, comparing studies on wells-to-wheels carbon dioxide profile versus the impact on older engines, and more. But marine users in...

Eight years ago, ethanol was going to let the U.S. grow its own vehicle fuel, reduce its use of gasoline made from imported oil, and boost energy security. How much have you heard about those themes lately? Not much, we'd wager. A lot has changed since the 2007 passage of the Energy Independence...

For fans of fuel efficiency, the New York Times has good news and bad news. The good news is: drivers in the U.S. are using less gas these days. The bad news is: that's driving up the cost of gas. To anyone who's taken Econ 101, that probably seems counter-intuitive -- mostly because it is. To...

Back in the 1930s, the United States produced the vast bulk of the oil it burned. It wasn't until the 1973 oil crisis that things like OPEC and fuel efficiency entered the U.S. consciousness. And it took a while longer for the phrase "energy security" to come along. That's what led to the concept...

Last month, the governors of eight states and almost 200 members of Congress asked the U.S. Environmental Protection Agency to suspend rules that mandate production of ethanol for use in gasoline. On Friday, the EPA said no. The request to suspend parts of the 2007 Renewable Fuel Standard came from...

With flex-fuel cars that can run on E85 ethanol still a minority of the vehicles on sale, you might think ethanol isn't as important as some other future fuels. But up to 10 percent of every gallon of gasoline you buy today is ethanol, and that proportion may rise to as much as 15 percent if gas...

You felt the earth shake a week ago today when the EPA formally approved the sale of E15 gasoline, right? Oh, you didn't? Not surprising, really. No gas station in the U.S. sells E15 today, and it looks like it may be a while before any given driver sees the stuff showing up as one of several...

Ah, ethanol, that most political of alternative fuels. Farmers love it, deficit hawks hate it, automakers want it for flex-fuel CAFE credits but nowhere else, and environmentalists only want it if it doesn't suck up food supplies, use too much water, or worsen the carbon balance. Yesterday, EPA...

The once-unthinkable actually happened last Thursday: The U.S. Senate voted 73-27 to abolish a 45-cents-per-gallon subsidy to the U.S. ethanol industry. Immediately. Because the amendment to end ethanol credits is attached to a stalled economic development bill, however, it will have little...

While the legal status of E15 gasoline is in doubt, the Environmental Protection Agency is moving forward with plans for it to roll out before this summer's driving season. That means that drivers will have to pay attention to the labels on their gas pumps, making sure that E15 is only used for...

Following its October approval of E15 gasoline for 2007 or newer cars, the U.S. Environmental Protection Agency is to announce today that it will expand the approval to cars from the 2001 through 2006 model year as well. E15 contains 15 percent ethanol, half again as high as the legal maximum today...

Every major automaker selling cars in the U.S. has signed onto a lawsuit filed Monday aimed at halting the rollout of E15 gasoline, which has a higher proportion of ethanol (15 percent) than today's E10 gasoline. The companies cite fears that the greater concentration of ethanol will damage engines...