Biodiesel Burps… Wrong Mix

Fight disinformation. Get a daily recap of the facts that matter. Sign up for the free Mother Jones newsletter.


Soybus.jpg What if the biodiesel you’re buying doesn’t have as much biodiesel as advertised? Or a whole lot more? Well, according to a new analysis of more than 20 distributors and small U.S. retailers, blends sold as 20% biodiesel contained as little as 10% or as much as 74% biodiesel. The study by Christopher Reddy at the Woods Hole Oceanographic Institution and colleagues is published in Environmental Science & Technology.

The problems are manifold (pun, sadly, intended): from a shaken public confidence to tax credits given in excess of what sellers deserve. Plus, blends containing more than 20% biodiesel can damage hoses and gaskets in cars manufactured before 1993, and can also freeze in cold temperatures. This could plug fuel filters or freeze fuel solid in the tank. The blending problem is most apparent with smaller mom-and-pop retailers mixing it themselves. From ES&T:

The biodiesel industry is trying to rein in the problem, says Amber Pearson, a spokesperson for the National Biodiesel Board, by working with ASTM on standards that will include biodiesel blends. States will then have to adjust their own regulations to include blend verification.

Growing pains, let’s hope.

Julia Whitty is Mother Jones’ environmental correspondent, lecturer, and 2008 winner of the John Burroughs Medal Award. You can read from her new book, The Fragile Edge, and other writings, here.

ONE MORE QUICK THING:

Or at least we hope. It’s fall fundraising time, and we’re trying to raise $250,000 to help fund Mother Jones’ journalism during a shorter than normal three-week push.

If you’re reading this, a fundraising pitch at the bottom of an article, you must find our team’s reporting valuable and we hope you’ll consider supporting it with a donation of any amount right now if you can.

It’s really that simple. But if you’d like to read a bit more, our membership lead, Brian Hiatt, has a post for you highlighting some of our newsroom's impressive, impactful work of late—including two big investigations in just one day and covering voting rights the way it needs to be done—that we hope you'll agree is worth supporting.

payment methods

ONE MORE QUICK THING:

Or at least we hope. It’s fall fundraising time, and we’re trying to raise $250,000 to help fund Mother Jones’ journalism during a shorter than normal three-week push.

If you’re reading this, a fundraising pitch at the bottom of an article, you must find our team’s reporting valuable and we hope you’ll consider supporting it with a donation of any amount right now if you can.

It’s really that simple. But if you’d like to read a bit more, our membership lead, Brian Hiatt, has a post for you highlighting some of our newsroom's impressive, impactful work of late—including two big investigations in just one day and covering voting rights the way it needs to be done—that we hope you’ll agree is worth supporting.

payment methods

We Recommend

Latest

Sign up for our free newsletter

Subscribe to the Mother Jones Daily to have our top stories delivered directly to your inbox.

Get our award-winning magazine

Save big on a full year of investigations, ideas, and insights.

Subscribe

Support our journalism

Help Mother Jones' reporters dig deep with a tax-deductible donation.

Donate