� #1
Old 03-19-2009, 08:29 PM
Lecturer
Join Date: Apr 2006
Location: Illinois
Posts: 941
Mad Scientest is on a distinguished road
Default Get better gas mileage

Well to start with there is the obvious, drive slower, avoid fast starts and stops, and make sure that there is enough air in the tires or even 3-4 pounds over for less rolling resistance. But beyond that----

I did some experimenting about a year ago with an emergency backup electrical generator that I built, it use a small Honda car engine as source of power. This then proved to be a good test bed for trying different fuel additives and oils.

It has been claimed that adding Acetone to your gas will increase mileage. The recipe is 2 ounce of acetone for every 10 gallons of gas. On my truck this gave me about one mile per gallon more.

When running this test on my generator I tried acetone to gas ratios of one, two, three and four ounces to ten gallons of gas. Compared to just gas only the best fuel economy was with one ounce per ten gallons. At greater concentration the fuel economy was worse. The old adage that if a little is good then more must be better does not work here. I had a .6% improvement.

Next I tried one ounce of acetone plus one ounce of xylene per ten gallons of gas. This gave a .85% improvement. (Acetone and xylene are available in the paint section of a hardware store.)

Then I tried �Marvel Mystery Oil� this stuff has been around since car were invented and is claimed to cure whatever problems your car might have. It actually worked! Giving a 1.4% improvement. (Available at auto parts stores)

However what made the biggest improvement of 6.7% was replacing the worn out spark plugs. (I used a NGK brand which consistently have a lower internal resistance then other brands which makes for a hotter spark.)

Finally I replaced the old spark plug wires this gave another 2.6% improvement.

I then tested four different engine oils. I started with a cheep generic �Wal-Mart� oil, then a couple oils with higher anti-friction additives, plus a synthetic �Mobil 1 for Truck&SUV�s� (again more anti-friction additive then the regular Mobil one.)

After running each of these I went back and added an extra can of additive to each of them and ran them again.

And the winner was----- the cheepy generic Wal-Mart brand. It provided the longest run time for a given amount of fuel. Certainly not what I was expecting.
Reply With Quote
� #2
Old 03-20-2009, 02:09 AM
Kevin's Avatar
Admin
Join Date: Apr 2003
Posts: 698
Blog Entries: 14
My Mood: Amazed
Kevin is on a distinguished road
Default

Thanks for these experiments and tips, MS! You are a genius. I was only aware of the obvious part, never thought of anything else.
Reply With Quote
� #3
Old 03-20-2009, 09:17 PM
Arrowwind09's Avatar
Standing at the Portal
Join Date: Oct 2007
Location: At The Door of Death
Posts: 3,235
Blog Entries: 12
My Mood: Fine
Arrowwind09 is on a distinguished road
Default

Does my car even have spark plugs? If it does I never change them. I know nothing about cars. Honda CRV 2002

so should we mix the Marvel Mystery Oil with the Walmart Oil?
__________________
"The nurse should be cheerful, orderly, punctual, patient, full of faith, - receptive to Truth and Love" Mary Baker Eddy
Visit www.HealthSalon.org
Reply With Quote
� #4
Old 03-22-2009, 09:41 AM
Lecturer
Join Date: Apr 2006
Location: Illinois
Posts: 941
Mad Scientest is on a distinguished road
Default

Yes your car has spark plugs (4 of them) that is unless it is strictly a lawn ornament that you do not drive.
Being that it is a 2002 and if you are a �typical� driver you should have 70,000 to maybe 105,000 miles on it. If you never changer the spark plugs, it�s time. New plugs are about $3 apiece. At that time it would also be a good idea to replace the wires that go to the plugs. With time and the heat from the engine the insulation on these wires will dry out and the extremely high voltage that they carry can �leak� out. This will be most noticeable on damp or raining days and this can cause the engine to shake and run rough and gas mileage will go down. Even though you could go considerably longer before having to replace these replacing them parts is not major surgery and will make for a more reliable running car.

The Marvel Mystery Oil can be mixed with both the oil and the gas. In my test I only mixed it with the gas. 4 ounces per 10 gallons.

The car that the engine I used on my generator came out of, had over 200,000 miles on it. I seriously doubt that the guy who owned it did much in the way maintenance. Thus the improvement was more dramatic. This is sort of off topic but here is the story of my generator project.



Where I am located we have always had an electrical problem. Frequently during a good rain storm we will lose power. Of course with no power the sump pumps cannot run and if the rain is really coming down is amazing how fast the basement can start to flood. Seeing as how my workshop is in the basement the thought of all my �toys� getting wet is just not acceptable.

So some time back, at a garage sale, I bought a used electrical generator. It would start OK when cold but died when it warmed up. I determined that it needed a valve adjustment, fixed that and got it to run well under load. However under no load such as when the sump pumps shut off after having pumped all the water out of the sump, its governor could not maintain speed. Its speed would oscillate wildly up and down until it would finally die, of course shortly after this the sumps would have filled up to the point where the pumps wanted to turn on. This became annoying and no amount of fiddling or adjustment of the engine could cure it.

Now obviously I could have just gone out and bought a different generator, but way buy something for $2 when you can make it yourself for $20?

So I bought this 10 kilowatt generator and then all I needed was about a 20 HP engine to run it. Also I kind of wanted some thing that could run at a nice �quiet� 1800RPM. After exploring some different options it turned out that a friend of a friend knew of a guy who had an 87 Honda CRX for sale. It had a small 1500cc engine that would be just about right. Also the price was far less then what I would have paid for say a small new lawn tractor engine, plus it was fuel injected. He claimed the engine ran good but he wanted to get rid of it because a rear axle bearing was making noise, actually it screamed like a banshee, but for some reason he didn�t feel like it was worth repairing.

So on an overcast morning my friend and I drove 50 miles to view this mechanical marvel. It was almost beyond description as it sat there in its entire pristine splendor. The engine started right up with just a tap of the key and ran well, just as claimed, plus it had a new (2 year) old battery and a new exhaust system.

Well OK it did have a �few� mechanical problems. It had three alloy wheels and one steel wheel, which was flat, the front bumper was cracked, the plastic front fenders had numerous cracks, the hood had a slight warp in it, the passenger door would not open, the sun roof would not close, the rear hatch had a broken hinge and its gas support springs had long since lost their gas, a length of �� pipe was used to hold it open when needed, the rear bumper was held on with a couple �L� brackets, the interior what was there was of it was ripped and torn, the turn signals only work in one direction, never did try the head lights although there were two sets of add on headlights, one of which might have worked. It was all that I could have ever hoped for.





I happily paid the gentleman, surprisingly he did not seem least distraught at having to give up this gem, and thus we started the trip back home with rear wheel bearing screaming away. Steering was a little loose and sloppy but not too bad if you didn�t go very fast. Which was OK because the brakes didn�t feel like they were up to high speeds either. About one third of the way home the overcast sky turns to rain, and of course the windshield wipers did not work. Should have brought my bottle of �Rain-X� along. Made it to a �Burger King� stopped had some lunch while waiting for the rain to let up. Then jerry rig the windshield wiper crank arm that fell off back in place with some plastic tie-wraps. Make it home with no further problems. Engine ran great this was just the kind of car that I wanted.

I then spent the next two weeks carefully removing the body from around the engine. My goal here was to save only the wiring and the other parts that were actually needed to run the engine. Thus I went through it cutting out all the wiring that I knew was not needed, headlights, wipers, AC, etc. It was amazing how much wire there was in a small car like this, but the next door neighbor thought it was great as he grabbed an arm full of it to use to tie up his tomato plants.



Some of the wires & ECU that �are� needed to make engine run.


When I was tracing the wires back to the fuel pump I cut the �coat hanger� that was holding the fuel pump in place and gently wiggled it to make sure I had the right wires. Where upon the rusty fuel line to the engine promptly broke and I had the fuel pump in my hand and the gas tank dripping gas, this then seemed like a good time to drain the gas tank. I then removed the gas tank, as I plan to use it on my generator, and here is view of the rear suspension, or what was left of it, that was in front the tank.



Until the �bad� wheel bearing this was the guys� daily driver?

Anyway I got out of it what I wanted.



The rest of it



went to our local scrap pickers, who come around on garbage day looking for any small bits and pieces of metal that they can find and take to a scrap yard and get a few dollars for. This for them this was a gold mine.


So now with the body and other useless parts disposed of, I turned my attention to the engine. Time to give it a bath and a close inspection. Removed the transmission and disassembled it and saved the bell housing and the input shaft. It did have an oil leak which appeared to be the rear main seal but turned out to be just a leaky oil pan gasket. Fixed that and replaced the rear seal on general principles. The alternator belt was totally worn out, replaced it. Checked the timing belt it was in surprisingly good condition and also checked valve clearance, they were all right on spec. The inside of the valve cover and oil pan were amazingly clean, no sludge! The spark plugs all had a nice tan color. For an engine with over 200,000 miles, speedometer broke at 217,000, I was quite pleased with its condition.

Next I got some angle iron and steel tubing and proceeded to weld up a stand to mount it on. Nothing real fancy here, gas tank is on the bottom with the engine over it. For expediency I mounted all of the external engine controls in essentially the same locations as they when they were in the car. The original instrument panel is mounted in the new control panel. In the space that was occupied by the broken speedometer I now have the electronics that maintains the engine speed. It controls a motor that pulls on the cable that went to the accelerator pedal.

Turned the case hardened gear teeth off of the transmission shaft so I could mount the pulley that drives the generator. Probably would have been easier to make a new one from scratch, but it had the correct spline to mate with the clutch disc.

Mounted the computer, cut wires for all the controls and sensors to the correct length and then taped them into neat bundles. Engine fired up first try, well first try �after� I discovered that I the main engine harness was not plugged into the chassis wiring. However we won�t talk about how long it took to discover that.

Finally with everything working I added some engine flush to the oil, ran it for a while, tightened a clamp on the upper radiator hose that somehow failed to have gotten tighten, then drained the oil changed the filer and added fresh oil.





So I am now ready for the next power failure.

************************************************** ***************************


As it turned out the following week I was fortunate enough to have the opportunity to put it to work.
It was a Thursday and I had just brought the dogs in from what they consider to be their mandatory afternoon walk, it was overcast and just starting to rain. I sat down to rest for a bit and it was 5 maybe 10 minutes before I noticed �boy it�s really dark outside� and sounds like it is raining pretty good too. I also noticed that we had lost power so I went into the garage to take a look at the storm. First thing I see is the ground is everywhere covered with small branches, twigs and leaves. Looking across the street the neighbor has three trees down! These were 10 to 14 inch diameter broken off at the base. The neighbor to the right of me also lost a couple trees. I lost one branch on one tree and I did not hear a thing!!!

Turns out we had numerous mini-tornadoes thought out the area that day taking down trees, power lines and flooding rivers. The power company was totally overwhelmed. It was Sunday morning before our power was back on.

Needless to say I ran the generator; it powered the sump pumps, and kept three freezers freezing and prevented a refrigerator from losing its cool. A couple neighbors ran an extension cords over to run their sump pumps. Judging from past experience I can safely say without it I would have 12 to 18� of water in the basement. As it was all I had was a little seepage around the windows, not even enough to bother wiping up. Also had it running the pump for the well so I had water for taking a shower and flushing the toilets, a benefit which did not go unnoticed by friend wife.

The generator ran great and is reasonably quite, you can carry on a conversation while standing next to it, and yelling is not required. I could not be more pleased with the way it ran.


************************************************** *************************
Reply With Quote
� #5
Old 03-22-2009, 10:11 AM
Kevin's Avatar
Admin
Join Date: Apr 2003
Posts: 698
Blog Entries: 14
My Mood: Amazed
Kevin is on a distinguished road
Default

Very interesting story, I enjoyed reading it. Your generator looks very good. But so much knowledge needed to be a mad scientist, electronic, mechanical, I hate them.

The summer is coming, your generator is gonna save you lots of troubles.
Reply With Quote
� #6
Old 03-25-2009, 05:53 AM
Arrowwind09's Avatar
Standing at the Portal
Join Date: Oct 2007
Location: At The Door of Death
Posts: 3,235
Blog Entries: 12
My Mood: Fine
Arrowwind09 is on a distinguished road
Default

Wow! We just took the simple route and bought a honda generator. Alas, we have insufficient talent for such endeavors. Good job!

My Honda CRV has about 40,000 so guess I can wait a while for that spark plug change?
__________________
"The nurse should be cheerful, orderly, punctual, patient, full of faith, - receptive to Truth and Love" Mary Baker Eddy
Visit www.HealthSalon.org
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On