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[note: new video has been added on step 1!]
[note 2: Most of what I write isn't relevant to Instructables. My main blog is here: biodieselhauling.blogspot.com]
Go 50-100% farther on a tank of fuel.
Due to its size and weight this truck is considered a commercial vehicle and is exempt from even light-truck CAFE standards. Even so, with the modifications I have made, I am getting higher mileage than CAFE standards for 2009 cars.
I read an article in Mother Jones Magazine about Wayne Gerdes, mileage champion, and was inspired. I have read that people tend to get between 10 and 16mpg on average in the same truck I have. I was getting around 15. After the mods described here, on a recent tank I got 30.28mpg.
The best thing to do is to not drive at all. Ride a bike, take the train, carpool.
If you do drive, buy the absolute smallest car you can. If you only need a big vehicle occasionally, rent one.
I bicycle or use my 70mpg 250cc motorcycle for personal transport, but my truck still gets a lot of miles, so I wanted to make it as fuel efficient as possible.
I use this truck for work, moving up to 3 tons of soil or broken concrete, entire 1 bedroom apartments worth of belongings (including furniture) in a single trip, etc.
I also need something with enough power to move my 7500lb RV trailer (which is also my home - a very efficient way to live: I use as much electricity in a month as the average American home uses in one day)
Most of these steps could be done to any vehicle, increasing mileage from 50% to 100% or more.
[note 2: Most of what I write isn't relevant to Instructables. My main blog is here: biodieselhauling.blogspot.com]
Go 50-100% farther on a tank of fuel.
Due to its size and weight this truck is considered a commercial vehicle and is exempt from even light-truck CAFE standards. Even so, with the modifications I have made, I am getting higher mileage than CAFE standards for 2009 cars.
I read an article in Mother Jones Magazine about Wayne Gerdes, mileage champion, and was inspired. I have read that people tend to get between 10 and 16mpg on average in the same truck I have. I was getting around 15. After the mods described here, on a recent tank I got 30.28mpg.
The best thing to do is to not drive at all. Ride a bike, take the train, carpool.
If you do drive, buy the absolute smallest car you can. If you only need a big vehicle occasionally, rent one.
I bicycle or use my 70mpg 250cc motorcycle for personal transport, but my truck still gets a lot of miles, so I wanted to make it as fuel efficient as possible.
I use this truck for work, moving up to 3 tons of soil or broken concrete, entire 1 bedroom apartments worth of belongings (including furniture) in a single trip, etc.
I also need something with enough power to move my 7500lb RV trailer (which is also my home - a very efficient way to live: I use as much electricity in a month as the average American home uses in one day)
Most of these steps could be done to any vehicle, increasing mileage from 50% to 100% or more.
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Signing UpStep 1The cheapest, and most important step
Modify driving habits
Single most significant difference, in any vehicle: "Adjust the nut behind the wheel"
(Drive more efficiently.)
Stay at (or below) the speed limit.
(Remember, you only save 7 seconds per mile going 75mph instead of 65mph, but stopping distance and wind resistance increase exponentially; twice as fast = 4 times the force)
Accelerate gently (Keep RPMs low whenever possible)
Never accelerate towards a stop light. (Every time you brake you are wasting momentum)
Never idle. A popular misconception is that it uses more gas to start than to idle. This was true of older (carbureted) engines. This is not true of modern (fuel injected) engines.
More advanced techniques include actually shutting off the engine and coasting as often as practical. (This can change the feel of the brakes and steering, see step 4)
(PLEASE READ the entire instructable and all the comments before commenting about how dangerous it is to coast.)
NOTE: many automatic transmissions can be damaged by coasting with the engine off.
To find out if yours is one of them, consult this list: http://www.motorhomemagazine.com/dinghytowingguide/
If you have an automatic, and your car is on the list, you can shut the engine while moving.
If it is not, do so at your own risk. You may still benefit from shifting into neutral (engine on) when coasting downhill or towards a stop, depending on whether or not your car has automatic deceleration fuel cut off (DFCI) built in (many newer cars do).
Single most significant difference, in any vehicle: "Adjust the nut behind the wheel"
(Drive more efficiently.)
Stay at (or below) the speed limit.
(Remember, you only save 7 seconds per mile going 75mph instead of 65mph, but stopping distance and wind resistance increase exponentially; twice as fast = 4 times the force)
Accelerate gently (Keep RPMs low whenever possible)
Never accelerate towards a stop light. (Every time you brake you are wasting momentum)
Never idle. A popular misconception is that it uses more gas to start than to idle. This was true of older (carbureted) engines. This is not true of modern (fuel injected) engines.
More advanced techniques include actually shutting off the engine and coasting as often as practical. (This can change the feel of the brakes and steering, see step 4)
(PLEASE READ the entire instructable and all the comments before commenting about how dangerous it is to coast.)
NOTE: many automatic transmissions can be damaged by coasting with the engine off.
To find out if yours is one of them, consult this list: http://www.motorhomemagazine.com/dinghytowingguide/
If you have an automatic, and your car is on the list, you can shut the engine while moving.
If it is not, do so at your own risk. You may still benefit from shifting into neutral (engine on) when coasting downhill or towards a stop, depending on whether or not your car has automatic deceleration fuel cut off (DFCI) built in (many newer cars do).
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On octane, it's best to try 87 and 93 in your vehicle and do a 5 tank average of each to see which gets mileage. A blanket statement of the car being made for 87 won't benefit from 93 is not a good one to make. If tuned for the higher octane (advance timing 2-3 degrees) you may find that you get enough better mileage off 93 to more than offset the added cost. More modern, computerized vehicles have multiple octane tables that do this automatically. When the engine is started it will try the high octane table, if knock is detected it will revert to the low octane table. This is fact, I have software that allows me to reprogram my computer (EFI Live) and have altered both tables. Remember that the OEM has their own formula for setting up the engines that covers the widest range of uses, and their formula isn't necessarily the best one for your needs. I'd also recommend trying this with different brands. I have had vehicles that will get better mileage with brand A than brand B, but a second vehicle will get better with brand B than brand A, and still others that didn't care what was in the tank. I've even had two otherwise identical vehicles prefer different brands, so this needs to be checked on a per-vehicle basis. Remember when testing that fuel formulations change in spring and fall, and this will impact efficiency.
If you don't mind digging into the engine, a camshaft swap will also help. OEM cams are a balance of power, fuel economy and emissions requirements. A cam that is weighted more towards fuel efficiency would benefit. It may no longer pass a mandated pollution test, but those tests are set conditions. A vehicle that uses less fuel per mile is going to be emitting less pollution per trip.
I tried the acetone. It only worked for 1 tank, after that saw no difference. 1 tank is not enough to say it helped, so in my experience acetone does nothing for you. Once again though, different vehicles will act differently, but it was really a big pain in the backside making sure there was always some in the car.
I've never actually owned a car new enough to have a computer, so I would have never known or thought to try that experiment.
biodieselhauling (at) gmail (dot) com
I'm guessing your the same person who PMd me on EcoModder?
I got your message, I'm going to take a pic before I respond
2 sheets of coroplast (grill block, underbelly, and sideskirts): $40
tonneau: $120
wood sides to tilt tonneau, from scrap wood: free
headlight covers: $10
electric fan: $15
electric vacuum pump: $290
manual steering gear: $50
buttons, switches, wire, misc: about $20
LED lights: $180
-----------------------
Total: $725
I may be forgetting something, but certainly under a grand all in all.
Based on how much I have driven in past years, the cost of fuel, and may change in average mileage, I should save about $2000 per year in fuel costs.
Assuming I spent all the money for downgrades upfront, it would have paid off after 6 months, (though of course this project was drawn out over about a year and a half)
Thanks for asking! Believe it or not, I actually never got around to putting all the costs in one place before. Its good to know.
Driving slowly is not illegal in a single state in the US. The posted speed limit is, without exception, the UPPER LIMIT to how fast you are allowed to drive. It is NOT a mandate that you must drive that speed, it is NOT a recommendation, and it is most certainly NOT the lower limit.
If you deliberately came to a complete stop on the highway, then you are impeding traffic.
If you were, for example, driving 15mph in a 65 zone, you could be cited for a number of things.
However, even then you are not actually impeding traffic, because on a multi-lane highway, people can just change lanes, and on an undivided country road people can pass in the oncoming lane or at turn-outs.
On city streets or mountain roads where it is not safe to pass, it is also not safe to drive 65mph, so there is no problem.
No where do I suggest driving 15mph on the highway. Below around 45 or so (depending on the vehicle) you have to shift into a lower gear, and therefor your mileage drops off.
There are some (not all) states in which there is a minimum speed limit on some highways. When there is IT IS CLEARLY MARKED ON EVERY SPEED LIMIT SIGN.
In Michigan, for example, on some freeways with a 65mph upper limit there is also a 45mph lower limit. This means you can go 20mph slower than surrounding traffic (that's assuming no one is speeding)
Bottom line is, you NEVER have to base your speed on what people around you are doing. If every single person on the highway is speeding, except you, then every single person on the highway is breaking the law, and you aren't.
Don't just make up stuff that you wish was true. Almost all laws are posted on the internet, so you can find and cite the exact vehicle code you want to inform people of, instead of spreading false rumors and confusing people.
I don't know of any modern vehicle which has max efficiency at a speed lower than 45 anyway, so there's no reason to go below that.
:D :D
Tailgate down - 24mpg.
Oh, Mythbusters has been caught outright lying about a great many things. And intentionally skewed results from a lot of other things as well.
Great entertainment, but please do not believe anything they say. They do it for entertainment value only.
BTW, how come no one has done an experiment with the tailgate removed?
And another one with those cargo straps for a tailgate?
2003 Chevy S10.
I have an iPhone App that reports real time MPG via the OBD2 port.
No tailgate, 29.8 mpg!
With tailgate, 30.3 MPG!
With hard Fiberglass Bed Cap 30.7 MPG!
With thin Plastic vehicle specific,'Cab-hi Shell, 30.6 MPG.
With the tailgate and the Shell Hatch removed, 30.8 MPG.
With a round tail-cone installed and sealed to the rear of the bed and shell, lots of duct tape!, 31.2 MPG.
These tests were made at the same time, during the same commute, down the same highway and reflect the average collected during a FULL WEEK of commuting for every result!
The Saturday before each of these weeks, the battery was disconnected, overnight, to reset the computer in the truck. This way the computer relearned the trip for that week. The ONLY modifications made were to the rear of the truck.
I have not yet tackled the front of the truck! I could change the grille, the head lights, use clear tape to seal any 'dirty' gaps. remove the windshield wipers. I could really go nuts with this stuff! But the truck has the 4.3 V6 and Over-drive Automatic. I KNOW I am doing damned good with the MPGs I am getting!
Do you believe dinosaurs didn't exist too?
But Mythbusters is strictly an entertainment show, nothing more.
Fun to watch them blow up stuff.
And no, I am not the paranoid type. I am more of a doubting thomas of sorts.
If I cannot recreate their experiments with the same or very similar results, then their show is a farce.
There have been complaints with them about some of the things they show.
Maybe googling 'mythbuster lies' could be of use?
Sure, it is primarily entertainment. And they don't always follow scientific procedure when it isn't convenient.
But they do deserve credit for bringing the concept of "don't take someone's word for it, actually try it" to a more mainstream audience.
As a "doubting Thomas" myself, I appreciate them for that.
How many miles did you do for each one, and under what conditions?
What method did you use to measure mileage?
So they really only proved it for that specific truck.
There have been other people to test and get different results. They just didn't have a popular TV show!
Anyway, what I have now is more aerodynamic than tailgate up, down, or flat tonneau, making the issue moot.
As to airconditioning, you get the best efficiency of all by having the A/C off AND the windows up. Put a beaded seat cover over white seat covers, tint the windows, paint the roof metallic silver, take off any excess clothing, and open the vents.
But one of the most important things we all can do is driver slower, it saves fuel and the most important thing, lives.
Max speed has been temporary lowered here from 120km/h to 110, and most of the people are raging against it, it's sad to tell, but most of the people don't really care about Self-sufficiency, environment or other peoples lives...
Anyway thank you for your great instructable.
p.s. I have a pickup too but I also ride a 250 bike or bicycle to work :)
In the USA we no longer even have a speed limit! We used to, at 55mph (89km/h), but it was repealed for no apparent reason in 1995.
Unfortunately, it didn't have the positive effects on fuel and lives saved was smaller than it could have been, because the law wasn't enforced.
Better than simply lowering the limit, if government really wanted to help save lives, reduce dependence on foreign oil, and ensure citizens respect the law (having a law and not enforcing it just tells the people they can do whatever they want) all they would need to do is have automatic radar/camera systems which send speeders tickets in the mail, in much the same way as bridge toll violators.
I really can't think of any drawback, other than whatever politician proposed it would be very unpopular.
That will cause an engine with high compression ratios to run poorly.
In a normal engine, there is no benefit to using high octane fuel.
In fact, it may run slightly less efficiently, because technically lower octane fuel has slightly less energy per gallon (very slight).
LOL
The whole interactive experience of watching traffic and lights 4 blocks ahead, paying attention to road grades, speed, gear, battery voltage, etc, figuring out when to coast and when to reengage engine, its almost like racing, except instead of maximizing speed, you are maximizing mileage. Its a challenge, and I get excited every time I work out the numbers at the pump and I got a little bit further than last time
However, it is justified and is nice to see the commitment that you have acquired through the use of your resources. Not only have you changed your vehicle, your habits and customs also
will try to do the same with my truck
Got pulled over tonight (a light was out) combined with me doing 45mph in a 50mph I guess I passed their "itch" thresh hold and the out light gave them the probable cause they needed to pull me over.
No problem all paperwork in order etc.. but on mentioning I was driving slower to save gas (there was no one behind me) he said got other things to worry about than a little gas.
I came back with $1100 in gas. He looked at me and said what? I said slowing down 5mph saves me $1100 in gas a year.
Just look at me oddly with shock :-) I said I drive 40,000 miles a year. a 3 mpg increase over 40,000 miles is about $1100 a year. (actually $1066 but $1100 was close enough)
He said. Oh and went back to check my papers.
I bet he checks his mileage this week :-)
Ironically enough, having been pulled over was the thing that inspired me to look into hypermiling further, which in turn led me to ecomodding, as well as to driving even slower now then I did when I was stopped.