Diesel engines are engineered and built to be more robust due to the higher compression ratio in the combustion chamber and the high torque output they produce.
For the first time ever, Diesel motorcycles publicaly demonstrate their potential in real riding.
At the Vetter Fuel Challenge in Ohio, vehicles powered by electricity, diesel and gasoline competed to see who would consume the least fuel in dollars and cents.
Renewable energy expert Dan Chiras talks about the future of fuel-efficient, diesel hybrid cars.
A couple readers passed on their advice about how to handle car dilemmas. Maybe biodiesel is the answer.
Researchers from the University of Michigan have developed a way to “pressure cook” algae to produce biocrude. The process shows promise in the development of green fuels.
San Francisco may become be the second city after Seattle to join a growing movement to divest from the companies driving the climate crisis.
Yanmar announces new utility tractor in the Lx HST Series.
Here's why a heat pump might be a good choice for your home.
Feels like I'm finally getting the ball rolling on my DIY Plug-In Hybrid Truck Project. I got a chance to visit Hot Rod Jim, talk about drive shafts, and even got the bed off the truck!
Pollution isn't just hurting our environment. It is a bigger cause of death in Southern California than motorized vehicles!
A treatise on the difference between a gasoline engine throttle and a diesel "throttle," what that means for MAX, and how the difference was overcome.
One of the newest apps for green car owners is Cleaner and Greener Fuels, which locates refueling stations for alternative fuel vehicles.
Declare energy independence this Independence Day, 2014
Last weekend more than 12,000 people flocked to Washington, D.C., for a three day demonstration to demand the creation of green jobs, cuts in the country’s greenhouse gas emissions and less dependence on fossil fuels.
T. Boone Pickens is calling Americans to submit videos about the importance of independence from foreign oil. The contest ends Oct. 25, and the winning video will be sent to national political leaders.
Here's a rundown of the many reasons behind the recent rise in the price of gas.
350.org founder, Bill McKibben, asks college students across the nation to “Do The Math” on why climate change matters and urges them to demand divestment from fossil fuels on campus.
Criminal racketeering by the fossil fuel industry is destroying our environment.
Read about new legislation that would stop the government from funding the fossil fuel industry. Then, sign your name to the petition and make a difference.
New federal standards will dramatically increase fuel efficiency in cars and light-duty trucks by 2025.
Step on the gas with a clear conscience: Use Clean Cities' vehicle comparison site to find the right light-duty model among alternative fuel vehicles, and green up your life in the fast lane.
You can run a truck on wood chips! No joke. Mother Earth News reported on this idea more than 25 years ago and the idea lives on. Using recycled water heaters, you can burn wood chips to power a truck, with little or no engine modifications required.
My MAX car got licensed with the local DOT to run on vegetable oil fuel and pay its proper taxes per gallon. Each state has its own rules; here's how we do it in Oregon.
For the first time, investors put more money into alternative energy sources such as wind, solar and geothermal power than fossil fuels such as coal and oil.
For the first time ever, alternative energy sources such as wind, solar and geothermal power received more investment money than fossil fuels such as coal and oil.
A Louisiana State University forestry researcher is looking at a fast-growing plant called switchgrass as a potential biofuel feedstock. Using switchgrass biofuel is practical because the plant requires little fertilizer and can tolerate drought and floods.
Do we have a national goal in America? Would this be a good one?
Comparing today’s cars that get 40 mpg or better to the high-mpg cars of a few decades ago is neither an accurate nor fair comparison.
Does 100 mpg fuel economy justify cross-country recreational travel? Maybe so and maybe not, but I need to be careful—increasing fuel efficiency can increase fuel consumption if you increase your driving, too.
Supply and demand have kept E85 gas prices low, and politics has played a role.
The T7 Series fuel economy is attributed to the design of the engine. With the SCR technology, the engine “breathes” clean air, instead of re-circulated exhaust gases, allowing the engine to simply do what it’s designed to do: produce maximum power.
As America’s fuel use continues to decrease, proposed solutions such as the Keystone XL pipeline and food-to-fuel conversions may be unnecessary.
Wood gas, or wood gasification, is a decades-old renewable energy technology that converts chunks of firewood, wood chips or other cellulosic biomass to power vehicles.
Homes in the United States a responsible for one fifth of all carbon dioxide emissions. Simply taking steps to reduce these on a domestic level will help positively impact carbon outputs, decreasing environmental damage.
There are many ways that each of us can lessen our unhealthy dependence on filthy fuels. You can do so in every area of your life, from choices you make regarding your house and home improvements, to food, transportation, and other consumer choices.
First in a series of blog posts which will cover conversion of lawnmowers and small engines from gasoline to propane.
This blog explains how the carbon cycle regulates atmospheric levels of carbon dioxide. The blog also discusses how the burning of fossil fuels has disrupted the carbon cycle which increases the amount of carbon dioxide in the atmosphere.
We discuss the concept that carbon dioxide released from the burning of fossil fuels is partly responsible for the current atmospheric carbon overload. We also briefly discuss other human activities that contribute to the atmospheric carbon overload.
In this posting we discuss the benefits of converting to renewable energy sources vs. the consequences of continuing to use fossil fuels.
In this posting we discuss how rock weathering controls the level of carbon dioxide in the atmosphere. We also discuss why rock weathering can't remove the excess carbon dioxide in the atmosphere that was generated by our use of fossil fuels.
TRUFUEL, a ready-to-use engine fuel, can be used in two and four-stroke engines.
One of our readers made a fiberglass and carbon fiber roof for his own home-built MAX high-mileage sports car, and here's how he did it.
Tips on how to increase your car's fuel efficiency by checking the tire pressure.
2011 Fuel Economy Contests in several locations in the U.S.
Our expert explains what really happens when fuel additives are put in a gas tank, and how this may cause more harm than good. If you really want to increase your mpg, our expert has a few tips for that as well.
The Rally Green starting flag drops in Knoxville Iowa, Sunday August 15, beginning a cross country fuel economy rally ending in San Francisco the folowing Saturday. MAX will be there and going for the gold.
The G-20 met in Pittsburgh this week to discuss global economic issues and agreed to eliminate fossil fuel subsides to combat gloabl climate change.
How much energy does it take to travel? Can we collect this from the vehicle while we are using it?
Grasshopper announces a new online tool designed to calculate fuel costs and impacts of commercial mowing equipment.
MAX gets a low cost, high accuracy, and none too attractive fuel gauge. Two out of three ain't bad.
According to the Federal Energy Regulatory Commission, 100 percent of the electric generating capacity added in January was renewable.
Whether you’re looking for a sporty two-seater, a large family vehicle, or a heavy-duty farm or work truck, here's how to find the best options for vehicles that use less fuel and save you money.
Mankind’s use of fossil fuels during the last 200 years has dumped millions of years of sequestered carbon into the atmosphere in the form of Carbon Dioxide. Since the beginning of the industrial revolution, 315 gigatons of carbon have been added to the atmosphere, leaving the carbon cycle 315 gigatons out of balance.
MAX won an award at the 2014 Maker Faire Bay Area for...gosh, we don't really know, but it was best in its class.
Ever wondered what its like to drive around using wood as fuel? Tag along with Chris as he fires up his wood gas truck.
Hit the road, using wood for fuel! Chris Saenz takes a trip on wood gas power.
Biomass grass crops can be established on marginal lands and processed as a fuel replacement for heating oil or propane
MAX got some new lager diameter wheels. They should do the job and the price was right, and as a bonus, they look terrific.
An introduction to DraftSight, Dassault Systèmes' 2D CAD software. It's professional quality and it's free, and Jack is converting all the MAX fabrication drawings to DraftSight .dmg documents.
See the power of gasification before we hit the road.
Engine efficiency depends on rpm (among other things) and slower isn't always better. More wisdom from the Honey Bear.
MAX is back at the shop, awaiting diagnosis and correction of an overheating problem, plus some additional body work before its next venture.
Hybrid cars save fuel by shutting the engine off at idle (among other things). Does MAX burn enough fuel at idle to be worth the effort? Our honey bear can tell us.
MAX at its first autocross. Hey, it's a sports car, right?
MAX got a new set of high efficiency Goodyear tires, and a second set of wheels so we can do comparison testing. Will the difference be detectable to our low budget testing technology?
A video demonstration of MAX's windscreen, which deflects air around the driver's face with minimal aerodynamic drag.
A question about our future.
The first civilian-built MAXes are nearing completion, and here are a couple of them that are rolling under their own power.
Technology marches on. It comes at a price, but a FloScan fuel consumption and mileage meter could give me instant feedback on MAX's fuel efficiency.
In the interest of making MAX a smidgeon safer, I've added side bumpers to the passenger compartment. Here's why I made them this way.
Using MAX to test a tubing streamlining material, resulted in a significant reduction in drag.
We're looking at a handful of low cost improvements, and since MAX is undergoing repairs at the moment, this is a good time to make them.
To improve MAX's versatility, the passenger seat is removable, which converts MAX from a couple carrier to a cargo carrier.
A few simple steps to make sure your tractor is ready for spring.
Hybrid-Like Fuel Economy Starts at $18,895; Goes on Sale in January
How will we live with no gas at the pump and no power in the grid?
Energy goals for America
MAX got a smog test at an Oregon DEQ Vehicle Testing Station, and passed with high marks.
Jack missed Rally Green and MAX has a mysterious overheating problem.
Some burglar wanted my Millermatic 180 more than I did, I guess. Here's why I liked it and why I'm going to get another one.
The clock is ticking and I've been taking some shortcuts on getting MAX ready for Rally Green ... and some have turned into long cuts. I need to work smarter, not faster.
The "High Mileage Car Show" at the latest Mother Earth News Fair, and the pleasure of driving a fuel efficient car.
You can save gas and money by keeping your tires correctly inflated. And now a group of high school students has launched a project to encourage drivers to regularly check their tires.
Natural Home editor-in-chief Robyn Griggs Lawrence explains a Pew Charitable Trusts study that finds that jobs in the clean energy sector are growing faster than jobs in the fossil fuel industry.
On a summertime cross country trip from Oregon to Ohio, I restricted MAX's radiator inlet air a little at a time, demonstrating that very little inlet area (28 square inches) provides sufficient air for cooling.
The EcoAire is designed to be installed in much the same fashion as a window air conditioner and just as easily.
MAX gets a temporary mash-up of old and new style body parts (the new nose is at the fiberglassers' having a mold made so we can make more of them) to get road-legal for a trip to Canada.
How much power and performance does a car need for a guy to get a gal's attention? According to MAX fans, not very much.
MAX ran with the motorcycles in the Vetter Fuel Economy Challenge, with surprisingly high marks--127 miles per gallon. Surprising to the author, at least.
We're cleaning up the details on MAX. One of the finishing touches is clear streamlined headlight covers, and here's how I made them.
A car's electrical consumption adds to its fuel consumption. For MAX, turning off the headlights improves fuel economy by roughly 4 mpg.
Results of the long-awaited cooling system test, which shows how little air MAX needs through the radiator.
MOTHER EARTH NEWS is proud to announce we have won a prestigious publishing award for our Guide to Green Cars.
This fall's Fuel for the Body T.O.U.R. ("Total Organic Understanding Ride") will educate the public on the benefits of living a green lifestyle that includes eating organic food and supporting local, organic farmers.
Propelling a vehicle with air or water is possible, but whether it’s practical is another story.
MAX is getting a garage mate. We're building a high-mileage pickup truck for those jobs that a sports car can't do, and this post outlines what we're starting with.
Jack took MAX to a local car show and found that even if they're not looking for high mileage, folks think MAX is cool.
Jack has dismantled MAX's body and is making molds from the body parts, so other MAX-like car builders won't have to duplicate his work.
This posting will discuss how the buring of fossil fuels is putting strain on the ecosystem of the ocean.
MAX is getting prepped for paint, and all the essential bodywork is done for the new, streamlined roadster body.
This posting discusses the role of carbon dioxide emitted from the burning of fossil fuel in ocean acidification. We also discuss the potential effect ocean acidification will have on marine inhabitants.
Volkswagon's high mileage (1 liter of fuel per 100 kilometers) car is getting closer to production. Expect to see 100 of these available to the public in 2013.
Learn more about the upcoming Vetter Fuel Economy Challenges.
MAX has very low rolling resistance, as demonstrated by this three year old kid pushing it around the building.
Renowned motorcycle inventor and longtime aerodynamics expert Craig Vetter stopped by the MOTHER EARTH NEWS office on his way home from his latest fuel economy challenge.
Craig Henderson and his Avion high mileage sports car went from Canada to Mexico at 119.1 MPG. He plans to produce Avion kits.
Use a digital tire gauge and learn how to check tire pressure regularly to get better gas mileage. While other types of gauges exist, the digital tire pressure gauge is an accurate and simple way to keep your tires properly inflated. Read this digital tire gauge review to see what digital tire pressure checkers you can buy.
The tail end of MAX's bellypan (diffuser) gets tuft tested, and the attached video shows the results. This was the finishing touch that got MAX its 100 miles per gallon on the highway.
I was gratified when, two weeks ago, Consumer Reports announced that the Chevy Volt was the best-loved car in the world among people who drive one – for the second year in a row. I have never loved a car like I love this one. And I have loved some cars.
Why pre-1960 race cars were more efficient than post-1960 race cars, and thus a better example for high efficiency highway cars.
Explore how you can make your own home grown organic fuel to power your own transportation or electricity.
Blume Distillation debuts appropriate-scale biofuel distillation equipment that will allow farmers, entrepreneurs, municipalities and communities to produce their own alcohol fuel from a variety of readily available fuel stock sources.
Western civilization is totally dependent upon cheap and abundant energy. Three quarters of the petroleum we burn in our engines is imported. Could it be cut off suddenly? Without cheap and abundant energy, our way of life would collapse. If we value our freedom and independence, we should not be relying on foreign petroleum. We should be making our own energy.
This is a rundown of films that came out in the last few years. These films cover a wide range of environmental topics, from energy, climate, and fuel, to food, farming, and health. Many of the films have won awards or been critically acclaimed.