fuel economy

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.
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.
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.
The first civilian-built MAXes are nearing completion, and here are a couple of them that are rolling under their own power.
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.
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.
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.
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.
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.
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.
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.
Why pre-1960 race cars were more efficient than post-1960 race cars, and thus a better example for high efficiency highway cars.
To improve MAX's versatility, the passenger seat is removable, which converts MAX from a couple carrier to a cargo carrier.
A video demonstration of MAX's windscreen, which deflects air around the driver's face with minimal aerodynamic drag.
MAX at its first autocross. Hey, it's a sports car, right?
A car's electrical consumption adds to its fuel consumption. For MAX, turning off the headlights improves fuel economy by roughly 4 mpg.
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. 
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.
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.
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.
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.
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.
MAX got a smog test at an Oregon DEQ Vehicle Testing Station, and passed with high marks.
MAX got some new lager diameter wheels. They should do the job and the price was right, and as a bonus, they look terrific.
MAX has very low rolling resistance, as demonstrated by this three year old kid pushing it around the building.
For the first time ever, Diesel motorcycles publicaly demonstrate their potential in real riding.
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.
Using MAX to test a tubing streamlining material, resulted in a significant reduction in drag.
Engine efficiency depends on rpm (among other things) and slower isn't always better. More wisdom from the Honey Bear.
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?
Learn more about the upcoming Vetter Fuel Economy Challenges.
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.
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 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.
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.
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.
2011 Fuel Economy Contests in several locations in the U.S.
MAX gets a low cost, high accuracy, and none too attractive fuel gauge. Two out of three ain't bad.
Hybrid-Like Fuel Economy Starts at $18,895; Goes on Sale in January
A question about our future.
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.
Do we have a national goal in America? Would this be a good one?
How much energy does it take to travel? Can we collect this from the vehicle while we are using it?
MAX is getting prepped for paint, and all the essential bodywork is done for the new, streamlined roadster body.
Craig Henderson and his Avion high mileage sports car went from Canada to Mexico at 119.1 MPG. He plans to produce Avion kits.
How will we live with no gas at the pump and no power in the grid?
MAX is back at the shop, awaiting diagnosis and correction of an overheating problem, plus some additional body work before its next venture.
Jack missed Rally Green and MAX has a mysterious overheating problem.
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.
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.
Results of the long-awaited cooling system test, which shows how little air MAX needs through the radiator.
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.
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.

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