100 MPG





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9/2/2009
MAX needs an aerodynamic and easy-to-assemble roof. Plus it needs to look cool, be cheap, cost little, have a simple design and be reliable. No problem, right? So, do you have any ideas?
2/19/2009
MAX's aerodynamic makeover is underway with a new fender design.
4/6/2010
At the time, it seemed like a clear car was a good idea.
10/23/2009
All computer data for MAX has been stolen. What next?
8/6/2009
Everyone should have a 100-mpg car, and know how to drive a manual transmission. MAX comes to the rescue on both ends.
11/11/2009
Jack explores how to test how body changes affect aerodynamics, and looks for inspiration from Wonder Woman.
10/1/2009
In the continuing pursuit of better aerodynamics, Jack takes a closer look at the design of MAX’s nose.
8/15/2008
MAX has a three-wheeled distant cousin that's a diesel-electric hybrid.
9/16/2008
The fine art of automotive design, especially high-mpg design.
9/23/2008
MAX will enter a race, uhhhh we mean event, and will run on veggie oil.
10/2/2008
What does MAX have in common with and old action, adventure, paranoia, social commentary BBC TV series of the '60s?
2/2/2010
Could MAX pass federal safety standards for mass-produced cars? Nope. Should that matter?
2/17/2010
In which Jack departs a little from his fashion sense and MAX gets new racing seats. But not just any racing seats: safer seats with real head restraints.
12/3/2010
MAX gets a couple of cheap and easy thermoformed headlight protectors, to keep light from getting out and rocks from getting in.
9/29/2008
Make the winning suggestion for the next X PRIZE and win $25,000.
5/30/2013
A big crowd likes MAXine better than MAX, and I’ll see you soon, at the MOTHER EARTH NEWS FAIR in Puyallup, Wash.
8/17/2009
MAX Puts the “Ex” in X Prize
1/29/2009
Sequestered indoors, Jack goes to work on streamlining MAX's body.
2/3/2009
From the Science Channel, watch the Brink TV show's spotlight on MAX and its victory in the Escape from Berkeley race.
4/29/2009
Thoughts on the potentially fuzzy math of mpg calculations.
9/21/2009
We're excited for the second annual Escape from Berkeley rally. Last year, MAX won the inaugural event from Berkeley to Las Vegas. This year, it's a run for the Mexican border!
10/25/2010
An after-the-fact analysis of MAX's accident on the way to the MOTHER EARTH NEWS Fair, and the dangers of "getthereitis."
9/23/2010
En route to the MOTHER EARTH NEWS FAIR, Jack listens all too well to GPS and ends up on dirt roads in the Oregon Outback.
9/24/2010
So here you have it: MAX with a crumpled rear fender, crumpled trunk section, a turn signal bashed out, a door knocked loose, and a flat tire. It's fully reparable, but not today, and not in time to drive to the MEN Fair.
3/23/2010
A reader recently raised concerns that MAX is illegal in Uncle Sam's eyes. Here's the skinny.
12/9/2009
This potential body style looks hard to beat, in more ways than just physically. What do you think?
7/12/2010
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.
10/8/2010
Cam shares some of the things he is grateful for....
8/21/2008
MAX is back from the dead after its infamous wreck. So why is the frame gray?
10/10/2008
MAX is hitting 60 mpg. That's better than a Prius, and before we get serious about streamlining.
10/10/2008
MAX is encountering robust competition at Escape from Berkeley
11/5/2008
It's the age-old tug of war between good looks and streamlined, aerodynamic design. 
11/19/2008
Brink TV show seeks "low-budget mad scientist." Jack and his MAX project fit the bill!
11/26/2008
It's time to calculate MAX's aerodynamic drag. Enter champagne science on a beer budget!
12/5/2008
MAX needs a roof, stat.
5/15/2010
We're modifying the Lola race car's nose to fit MAX's chassis. The first step is cutting the nose down the middle so we can move the fenders apart a few more inches, which will let us steer enough for parking and other normal street activities.
6/9/2010
There's a new automotive fuel efficiency contest coming up -- the Rally Green -- and now MAX has a tachometer, a digital wonder called a Tiny Tach.
8/3/2010
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.
8/25/2010
MAX is back at the shop, awaiting diagnosis and correction of an overheating problem, plus some additional body work before its next venture.
5/4/2011
Using MAX to test a tubing streamlining material, resulted in a significant reduction in drag.
6/5/2011
Learning from experience, I've put some impact-resistant structure on the back of MAX.
7/5/2011
MAX got a smog test at an Oregon DEQ Vehicle Testing Station, and passed with high marks.
3/22/2012
Conversion kit install to convert a hybrid vehicle into a plug-in electric and improve your gas mileage by 25%.
8/23/2012
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.
9/19/2012
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.
2/16/2012
A video demonstration of MAX's windscreen, which deflects air around the driver's face with minimal aerodynamic drag.
3/4/2012
To improve MAX's versatility, the passenger seat is removable, which converts MAX from a couple carrier to a cargo carrier.
5/15/2012
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.
10/21/2011
The "High Mileage Car Show" at the latest Mother Earth News Fair, and the pleasure of driving a fuel efficient car.
1/15/2012
MAX at its first autocross. Hey, it's a sports car, right?
12/26/2011
A car's electrical consumption adds to its fuel consumption. For MAX, turning off the headlights improves fuel economy by roughly 4 mpg.
10/21/2012
MAX finally got a deer deflector, after three years of writing about how much it needs one. It'll give a bit of extra rollover protection, too.
8/6/2012
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.
5/21/2011
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.
4/4/2011
Engine efficiency depends on rpm (among other things) and slower isn't always better. More wisdom from the Honey Bear.
8/18/2011
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.
7/29/2011
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.
8/7/2011
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.
9/23/2011
MAX gets a lightweight belly pan under the engine, to further reduce aerodynamic drag.
6/29/2011
MAX got some new lager diameter wheels. They should do the job and the price was right, and as a bonus, they look terrific.
7/22/2013
A searchable index for the MAX Updates posts, and a few more thoughts on the Progressive Automotive X Prize.
12/31/2012
The second attempt at weatherproofing MAX involves a convertible top which flips open to get in or out of the cockpit. Not perfect, but not bad.
2/5/2013
The first civilian-built MAXes are nearing completion, and here are a couple of them that are rolling under their own power.
12/23/2008
MAX turns heads and makes an impression at The EG, aka the Entertainment Gathering.
1/7/2009
Jack gets a wallop of motivation for a fully enclosed cabin, and looks ahead to a future with inquisitive grandchildren.
1/16/2009
Could MAX be the perfect car for driver's ed?
10/14/2008
MAX wins the Escape from Berkeley race!!
7/14/2009
Perhaps if we had just listened to the deer all along, we never would've ended up in this gas guzzling mess.
6/9/2009
In the pursuit of 100 mpg, cardboard is a nice medium for conceptualizing design features, but it has its limitations.
3/11/2009
MAX is well on its way to 100 mpg, if the lessons from these 100+ mpg motorcyles are any indication.
3/26/2009
MAX needs 25 percent more horsepower to get from zero to 60 mph in less than 18 seconds. Got any suggestions?
4/9/2009
One would think a car wouldn't need a mechanical inspection at 5,000 miles. But when you're building a 100-mpg car from scratch, and the builder is meticulous, it's wise to look for problems even when there are no signs of problems.  
8/28/2008
MAX version 2.0 is underway.
9/8/2008
MAX version 2.0 is about to start moving. This may come as a surprise, but Jack is going to try it with biodiesel.
7/11/2008
We're at work on a 100-mpg DIY car! Come meet MAX and take a seat for what will be a long, but fun, journey.
7/16/2008
Is the glass half empty? Half full? Or is there just too much glass? I'm designing MAX to be just the right amount of "glass" for the vast majority of our driving. Here's to efficiency.
7/25/2008
MAX gets a small favor from high-end luxury sports cars.
8/5/2008
Breaking News: MAX Totaled
11/17/2010
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.
11/6/2010
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.
2/21/2011
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.
1/31/2011
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.
3/6/2011
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?
4/8/2010
Is MAX an actual modern-day vehicle, or just a high school shop class experiment? In this update, Jack answers sharp questions from an automotive engineer.
7/22/2010
Results of the long-awaited cooling system test, which shows how little air MAX needs through the radiator.
7/27/2010
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.
8/22/2010
Jack missed Rally Green and MAX has a mysterious overheating problem.
5/23/2010
MAX's bodywork continues, as Jack modifies the race car nose to fit over the Kubota engine.
6/4/2010
More progress on MAX's streamlined body, using a laser to make curved body parts fit on a flat frame.
6/22/2010
A primer on fiberglass mold making and molding fiberglass parts, using MAX's nose parts (hood and bubble) as examples.
11/18/2011
In my 7,500-plus mile adventure in MAX this summer, one lesson really stands out: Haste Makes Waste.
3/23/2012
Why pre-1960 race cars were more efficient than post-1960 race cars, and thus a better example for high efficiency highway cars.
4/30/2012
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.
12/7/2011
A surprising benefit of MAX's streamlining is the increased luggage space.
6/29/2012
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.
6/1/2011
By making a pattern and a mold, we can now reproduce rear fenders as needed.
8/29/2011
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.
6/20/2011
MAX has very low rolling resistance, as demonstrated by this three year old kid pushing it around the building.
10/15/2008
MAX debuts by taking the checkered flag of the 800+ mile, no gasoline consumed, Escape from Berkeley race.
7/1/2009
Considering deer, it’s time for a roll bar.
7/21/2008
Conservation over corn.
9/8/2010
MAX is getting prepped for paint, and all the essential bodywork is done for the new, streamlined roadster body.
9/3/2010
Craig Henderson and his Avion high mileage sports car went from Canada to Mexico at 119.1 MPG. He plans to produce Avion kits.
2/7/2011
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.
12/23/2010
MAX gets a low cost, high accuracy, and none too attractive fuel gauge. Two out of three ain't bad.
1/5/2010
I hate to say it — because electric cars may be the salvation of transportation someday — but much of the current hype around electric cars is smoke and mirrors. 
1/12/2011
The U.S. Green Building Council's Project of the Year is a small, urban home built for $100 per square foot.
9/14/2007
5W-30? 10W-30? Be sure you get the right motor oil grade.
9/7/2007
You can boost your mpg by losing the cargo in your trunk. Then help reduce global warming emissions by sweating off a few pounds.
8/10/2007
Make new friends, save big bucks on gas, reduce pollution!
8/3/2007
Slow down and enjoy the scenery — you'll also enjoy a significant boost in your mpg.
8/24/2007
Here's how to change your car's air filter — do it yourself to save big bucks and boost your gas mileage by 10 percent.
12/10/2009
Renewable energy expert Dan Chiras talks about the future of fuel-efficient, diesel hybrid cars.
8/17/2007
How long has it been since you checked your tire pressure?
8/31/2007
Green means go, but don't go too quickly.
10/12/2007
Here's another gas mileage myth busted: it's better to turn off your engine than to leave it idling.
10/5/2007
Sometimes the most direct route to your destination may not be the most fuel-efficient.
10/26/2007
Forget what your grandpa told you — there's no need to warm up your car every cold winter morning.
7/13/2007
Calculating your fuel economy is easy and can help you save big bucks at the pump.
9/15/2009
How often, if ever, do you check your the gas mileage of your car or truck? Did you know it's super simple to calculate mpg, and observing it over time can help you improve your gas mileage and save money?
4/29/2010
MAX's classic race car skin remains a work in progress. Jack wants MAX to look Lola-esque, but not too Lola-esque.
2/23/2011
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.
7/20/2007
Want more gas for your money?
7/27/2007
Don't rip yourself off at the gas pump — stop topping off!
4/4/2012
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.
12/14/2012
Using an MPG app may help reduce your consumption of gas, and make your commute and road trips more economical and green.
4/22/2011
Save money and gas this Earth Day — and every day! — by using these five green driving tips from the Car Care Council.
2/21/2011
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.


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