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Author Topic: Modifications to increase MPG Back to Topics
AustinLee3
Veteran Author
Tennessee

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Message Posted: Feb 8, 2014 5:47:43 PM

Does anybody know of any modifications that you can do to your vehicle that could increase your fuel economy?
REPLIES (newest first) Post a Reply
twt
Champion Author Virginia Beach

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Message Posted: Mar 29, 2015 5:24:07 AM

Use Cruise control.
riders49
Rookie Author Manitoba

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Message Posted: Mar 28, 2015 6:03:47 PM

Can't modify your vehicle, but you can modify the driver. Check out "ecomodder.com", over 100 tips on hypermiling to save fuel consumption. It works, I save 20 to 25% of my fuel costs. From overinflated tires to driving consistently and slower.
dontuknowOH
Champion Author Ohio

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Message Posted: Mar 28, 2015 12:43:50 PM

This is only a thought; I do believe that a custom type of Go pedal could be designed for varying the resume rate interval of each slow down circumstance in traffic. Saying when in automatic mode The engine throttle would be advanced at a dampened rate when the resume force would be reapplied by the driver to bring currant desired travel speed back to the nominal set choice/permitting.

Of course an override circuit could instantly eliminate a hazard, maybe if hard acceleration was needed in traffic. The damper action would simply act similar to a door closer only working in reverse fashion, between the go pedal/throttle for an economy energy savings. The results would be gained by lowering resume interval G-force rates to gradual..... A thought.
GLM4205
Champion Author Toledo

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Message Posted: Mar 27, 2015 3:49:36 PM

No
PaylessKY
Champion Author Kentucky

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Message Posted: Mar 27, 2015 2:32:41 PM

Keep it original and serviced.
Hemond
Champion Author Providence

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Message Posted: Mar 27, 2015 1:27:03 PM

QUOTE ::::I guess GM, Ford & Chrysler--among others are just trying to pull a fast one on us since this doesn't work.::::


Those are your words not mine, your words are the exact opposite of what I said.


If the auto engineers are designing shutters into the leading edge bodywork of their vehicles, then they are testing them on the bench, on the dyno, on the track, and on the computer. They are not simply buying some 3rd party kit and fitting it behind the grille. Such devices are built to design specs, not slapped on haphazardly by backyard tinkerers after buying from some nitwit web site.

The goal is to streamline the front end to reduce coef. of drag and at the same time provide for air flow to the radiator. This is not done with products promoted by Green Car Reports. Those products are a nightmare in waiting which will likely destroy the engine.


3rd party shutters do not streamline, they increase drag, are prone to failure, and are an unknown as to reliability.
Hemond
Champion Author Providence

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Message Posted: Mar 27, 2015 1:17:08 PM

QUOTE ::::I guess you will disagree with this too;::::


Anything from radical left wing enviro groups like Green Car Reports is highly suspect. In this case the aftermarket supplier of automatic shutters they are promoting has stated,

"...in cold weather, our shutters help the engine warm faster".

That statement cinches it, they are utterly corrupt and looking to fleece suckers into buying their product. The fact is engine temp is controlled by the thermostat, not by blocking air into the radiator.


hoopitup2000
Champion Author Virginia

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Message Posted: Mar 27, 2015 9:31:03 AM

"Essentially a way to boost fuel economy at higher speeds, ACTIVE GRILL SHUTTERS are now being used by GM, Ford, and Chrysler--among others--to give GAS MILEAGE BOOSTS to their highest-efficiency models."So I guess GM, Ford & Chrysler--among others are just trying to pull a fast one on us since this doesn't work.
hoopitup2000
Champion Author Virginia

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Message Posted: Mar 27, 2015 7:40:09 AM

I guess you will disagree with this too;

Courtesy of Green car reports--"Over the past few years, more automakers than ever have started to promote something called active shutter grille vents.

Essentially a way to boost fuel economy at higher speeds, active grill shutters are now being used by GM, Ford, and Chrysler--among others--to give gas mileage boosts to their highest-efficiency models.

But what are active shutter grille vents, and how do they work?

In a conventional, front-engined, water-cooled, gasoline car, air is drawn through the grille and into the engine bay, either sucked in by the radiator fan, or forced in by the movement of the car through the air.

The majority of that air then passes through the fins of the radiator located directly behind the grille, helping cool down the coolant within, which in turn keeps the engine cool.

Unless that engine is working extremely hard, or is in a hot climate, however, there is often more air entering the engine bay than is needed to keep the engine cool.

Moreover, that unnecessary air entering the engine bay can add significant aerodynamic drag to the car, increasing the amount of energy needed to move it along and thus decreasing gas mileage.

The higher the speed, the higher the aerodynamic drag.

It’s at those higher speeds, when the active shutter comes into play."

[Edited by: hoopitup2000 at 3/27/2015 7:41:01 AM EST]
Hemond
Champion Author Providence

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Message Posted: Mar 27, 2015 7:24:08 AM

QUOTE:::::"Grill blocks have two purposes. The first is it cut down on aerodynamic drag by limiting the amount of air that enters the engine bay. The second is to allow the engine/transaxle (fwd vehicles) to warm up more quickly and retain more heat in the colder months by reducing excessive airflow through the engine compartment in colder months.:::


What we have here is a statement from some online hobbyists (EcoModders) working in their garage out back, who recommend defeating the design of the automotive engineers. The engineers have $million labs, a staff of PHDs, and a century of experience in industrial automotive design.

Yet we are supposed to believe that amateur internet groups like the EcoModders know best? There is no possible way that blocking anything, grill or radiator, hasn't already been studied extensively by engineering. The radiator and grill openings have been studied and tested and revised extensively until the best possible design was worked out.

No amount of fiddling by backyard enthusiasts is going to improve that one bit.


hoopitup2000
Champion Author Virginia

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Message Posted: Mar 27, 2015 6:50:59 AM

QUOTE "This is the functional equivalent to not having a radiator, blocked or no."

I never said anything about blocking the radiator. I was talking about blocking the grill.

Courtesy of Ecomodders

"Grill blocks have two purposes. The first is it cut down on aerodynamic drag by limiting the amount of air that enters the engine bay. The second is to allow the engine/transaxle (fwd vehicles) to warm up more quickly and retain more heat in the colder months by reducing excessive airflow through the engine compartment in colder months.

Grill blocks come in many forms, though most often they are made to be flush with the outside of the bumper for greatest benefit. Simply inserting a piece of cardboard in front of the radiator does not provide the same aerodynamic benefit.

While grill openings are usually oversized for "worst case" applications (towing a trailer through Death Valley with the A/C on), obviously care must be taken to monitor coolant temperature. If your cooling fan runs more after installing a block, you've gone too far. So, pay attention to your temp gauge and making your grill block easy to remove."



[Edited by: hoopitup2000 at 3/27/2015 6:51:26 AM EST]
drydem
Veteran Author Maryland

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Message Posted: Mar 25, 2015 1:27:17 AM

Switch to Low Rolling Resistant tires (like Bridgestone Ecopia EP422) or over inflate your regular non snow tires by 10 psi. Change your route to favor smooth dry flat road surfaces. Learn the hypermiling driving techniques smart/anticipatory braking, driving without brakes, driving with load, and pulse and glide. Drive at a slower speed. Attach a scangaugeII (or Android app w/obdii cable) monitor your fuel efficiency efforts.

my overall increase in fuel efficiency over the EPA rating has been 9.4 mpg
That is I'm getting 59.4 mpg instead of 50 mpg
Hemond
Champion Author Providence

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Message Posted: Mar 24, 2015 12:25:08 PM

QUOTE :::: I believe both comments have an interesting point to make.;::;


I agree. My current car has an engine which operates at 220-229 degrees. THe fan comes on at 239 degrees! It uses a funny 'blue' colored coolant. (Cost me $20 to buy one gallon of the stuff). It is designed to do this and it makes me uneasy. Yet this is what the engineers designed. It is the optimum temperature they chose for this engine.

Comparing this to my old car which had a thermostat that opened at 180 degrees. Fan came on at 200.
Hemond
Champion Author Providence

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Message Posted: Mar 24, 2015 12:15:07 PM

:::::::The coolant that bypasses the engines thermostat threw the heater circuit slows engine warming, That same varing cold air/how much going threw the heater core then acts as a smaller second radiator without a thermostat, ::::::



YOu got that right. In winter, the radiator often doesn't even come into play. The heat removed just by the heater core is enough to keep the coolant from opening the thermostat. This is the functional equivalent to not having a radiator, blocked or no.




dontuknowOH
Champion Author Ohio

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Message Posted: Mar 24, 2015 10:25:36 AM

Hemond: I believe both comments have an interesting point to make. I see the vehicles main purpose as to control engine over-heat or rather stabilize it's safe operational working range temps for a safe E.. life.

The radiator doesn't have total control of complete engine temperature losses, such as exhaust, aluminum engine block/cyl. heads, plus other parts, which radiate heat away similar to a heat-sink device.

The coolant that bypasses the engines thermostat threw the heater circuit slows engine warming, That same varing cold air/how much going threw the heater core then acts as a smaller second radiator without a thermostat, most cases.

The time interval for cold starts/restarts as you said are aided by the engines thermo, but it is about the dumbest, somewhat crud by todays standards as a device, but has great control but not perfect control.

I just see Block heaters, dip-stick, battery blankets, grill air blockers, inline coolant heaters as a way to shorten the engine running costs where fuel consumption is a concern, during that engine warm-up interval from any cold start, ETC. even an insulated Garage maybe?

It really diverts the cost to another source of energy, not counting solar devices as assisting. Moving along creating(motion) building a MPG savings is a small percentage and depends on the other initial warming percentage amounts per modification source.

I can accept that an aerodynamic designed ECM controlled grill block in use during temps of 50* F and lower would benefit the other percentage of engine heat loss by other sources than the radiator/thermo/coolant's purpose. Wish I had a laboratory years ago.... instead of a barn!
hoopitup2000
Champion Author Virginia

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Message Posted: Mar 24, 2015 8:33:40 AM

I said it works for me. Just let it go. Life is too short.
Hemond
Champion Author Providence

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Message Posted: Mar 24, 2015 8:05:37 AM

:::::An engine that warms up faster & runs 10-15° warmer doesn't get better mileage??????::::


Engine temp is controlled by the thermostat, not by blocking the radiator. Indeed, the radiator is completely out of the cooling circuit until the thermostat opens. If you block the radiator, the thermostat will simply open wider.

As for warmer giving better mileage, if that were true the engineers would use that principle on all cars. They would design a warmer engine. In reality the engineers test engines at all possible temperature extremes imaginable to find the optimum point. There is no possible way you have outguessed the designers. They have spent countless hours in the lab and with computer models to achieve the best mileage. YOur tweaking result is imaginary.
hoopitup2000
Champion Author Virginia

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Message Posted: Mar 24, 2015 7:28:30 AM

QUOTE :::::Partially block the grill during the colder months:::

"Has no effect on mileage."

An engine that warms up faster & runs 10-15° warmer doesn't get better mileage?????? Well it sure has helped on my car.
Hemond
Champion Author Providence

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Message Posted: Mar 23, 2015 11:08:20 AM

QUOTE :::::Partially block the grill during the colder months:::


This causes the thermostat to open wider. Has no effect on mileage.
Hemond
Champion Author Providence

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Message Posted: Mar 23, 2015 11:05:55 AM

Take the ski rack off the roof.

This astounded me. I keep a Scangauge permananently attached to my car. I've got it set to display horsepower and gallons/hr.

I normally get 32mpg when on the highway, but on ski trips I get 29mpg. On such long trips I travel at about 80mph most of the trip. The rack plus toys on top cut the mileage by 10 percent. I never would have believed this. The air resistance at high speed caused by the rooftop toys causes a measureable hit to mileage.

On a 300 mile round trip thats an extra gallon used. The lesson is take the racks off when not using them.
OilerFan
Champion Author Tulsa

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Message Posted: Mar 23, 2015 7:59:58 AM

the change that'll make the most difference is to get a more fuel efficient vehicle, rather than trying to make modifications to a vehicle. Consider that if there was some change that could be made, that gave a significant difference in mpg, the engineers would've already done it.
hoopitup2000
Champion Author Virginia

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Message Posted: Mar 23, 2015 6:47:09 AM

Partially block the grill during the colder months
ray44512
Veteran Author Ohio

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Message Posted: Mar 23, 2015 12:28:14 AM

Huge gains can be had by improving aerodynamics. Check out aerocivic.com and see the 95mpg Honda!
drydem
Veteran Author Maryland

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Message Posted: Feb 28, 2015 10:07:42 PM

1. install low rolling resistant tires like Bridgestone Ecopia, Goodyear Fuel Max, Michelin Energy Savers, or Yokohama Avids. 2. Over inflate your tires by 7 to 10 psi. 3. Redesign your route/commute to have very smooth dry road surfaces so you can drive under 40(*) mph without stopping too many times. (*) if you are driving something very un-aerodynamic like a classic yellow school bus or a hummer then drive under 25 mph. For normal cars... When driving under 40 mph - rolling resistance is the major energy drain on the power plant. When driving over 60 mph - aerodynamic drag is the major energy drain on the power plant. When driving a truck, bus, or SuV .. subtract 25 mph to 20 mph from the above energy consumption rule for cars.

[Edited by: drydem at 2/28/2015 10:13:24 PM EST]
ray44512
Veteran Author Ohio

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Message Posted: Feb 27, 2015 8:47:27 PM

Empty your trunk and air up your tires.
dontuknowOH
Champion Author Ohio

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Message Posted: Feb 23, 2015 6:29:17 AM

Cheaply wrapping (insulating) My vehicles heater coolant supply hoses(both) gave Me better fuel economy, better usable heat at all inside cabin vents.

The DIYed affect works for Me as long as one has a healthy maintained vehicle coolant system. The mod also reduced restart warn-up time, offered more available cabin heat for the Nasty Winter Days when driving away for engine warm-up as you go(getting mileage).

The DIY was a really a cheap cost for material used. one other advantage was for 4 cylinder engines it allowed the tranny to shift sooner over into top O-Drive gear at the highway speed, because of the quicker engine warming. Cold air blasts under-hood during motion on a drive-away affect engines to reach normal operation, so I do try to block that....WFMw!
pghbill
Champion Author Pittsburgh

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Message Posted: Feb 23, 2015 12:52:05 AM

get rid of the nut behind the wheel
OilerFan
Champion Author Tulsa

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Message Posted: Feb 22, 2015 11:48:34 AM

The easiest is to buy a more fuel efficient vehicle. Most of the things that people claim give better mileage, I'm not sure are much more than snake oil.

mybigtruck
Champion Author San Jose

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Message Posted: Feb 22, 2015 8:36:07 AM

pick your routes so you always drive downhill
Floridaman2013
Champion Author Florida

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Message Posted: Feb 22, 2015 8:28:14 AM

I keep all un-needed equipment/weight out of the vehicle, pump tires up to within 1PSI of tire sidewall max air pressure, keep air filter and engine oil clean, and drive reasonable when starting and stopping. Keep outside of vehicle higly waxed to help wind drag resistance.
hoopitup2000
Champion Author Virginia

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Message Posted: Feb 22, 2015 7:10:54 AM

The most effective thing to do is adjust the nut behind the wheel.
dontuknowOH
Champion Author Ohio

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Message Posted: Feb 18, 2015 8:38:10 PM

Aluminum hood, trunk lid, maybe fiberglass, OEMs did make vinyl/plastic body parts during the past years, still synthetic front aft bumpers, if one would still call them that. A canoe shape body style should help mileage.........
jameskel
Rookie Author Washington

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Message Posted: Feb 18, 2015 5:47:53 PM

DRIVER modification... it's the cheapest. it actually WORKS. and it's the one thing bad drivers don't want to do to get better mileage.... a little like a fat person wanting to lose weight but not give up the donuts.
PaylessKY
Champion Author Kentucky

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Message Posted: Oct 20, 2014 2:25:39 PM

No
carinthuist
Champion Author San Francisco

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Message Posted: Oct 20, 2014 1:06:59 PM

no
oilpan4
Champion Author Virginia

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Message Posted: Oct 19, 2014 2:08:01 PM

"If there were, the factory would have already done that."

The same could be applied to any vehicle parameter.

Some people want more speakers to make their ride louder, it could have been done at the factory, but they didn't.

Some people want better of road capability so they put a ranchhand bumper, warren winch and $1000 each over sized mud tires, all that could have been done at the factory, but they didn't.

Some people want more comfortable seats, to they shell out $3000 for custom seats, it could have been done at the factory, but they didn't.

Some people want their car to go faster so they modify the engine, it could have been done at the factory, but they didn't.

Some people want stupid looking 26 inch wheels on their vehicle, it could have been done at the factory, but they didn't.
Y2KSierra
All-Star Author Calgary

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Message Posted: Oct 19, 2014 10:27:25 AM

Modifications to the driver are by far the most effective. Proper tire inflation is important, a steady foot, gentle acceleration, proper vehicle mainenance, keep it clean and most important be kind to your ride.
dontuknowOH
Champion Author Ohio

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Message Posted: Oct 19, 2014 9:41:03 AM

After knowing how important good air pressure in the tires for good mileage. I then catch myself reminding many drivers when I visible see their tires maybe just one visible looking under inflated.
I hint for them to take time to do a check, even offer a pressure gauge, they often decline..... often have an excuse not to do it.
One out of 4 related to seem grateful and usually do the 2 minute check, backed up after checking another wheel pressure to verify!

Then they relate "Gee!" who would of thought that one was low? I always follow up with "yes it's your mileage affected" just glance now/then, for that and blame the colder Weather season....."Ha" "I want my gauge back" and G-Luck!
dontuknowOH
Champion Author Ohio

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Message Posted: Oct 14, 2014 8:45:32 AM

Sorry!, My Wife wouldn't tolerate a Wench installed on My vehicle instead of a post. A remote control Winch might be a success during Winter,... well anytime really. MPG..s are the real goal, but lower pricing HELPS!!!!

Aluminum bodies that's a consider..., I've seen aluminum rear suspension undercarriages on some GM vehicles a while back, wondering if alum... drive-shafts hold up for RWD vehicles?
MertieMan
Champion Author Lexington

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Message Posted: Oct 14, 2014 8:16:41 AM

If there were, the factory would have already done that.
hoopitup2000
Champion Author Virginia

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Message Posted: Oct 14, 2014 6:56:39 AM

The most effective modification????????????
Adjusting the nut behind the wheel
twt
Champion Author Virginia Beach

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Message Posted: Oct 14, 2014 5:50:25 AM

Drive with the windows closed. Use cruise control.
badbobKY
Champion Author Lexington

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Message Posted: Oct 14, 2014 4:36:15 AM

no
dontuknowOH
Champion Author Ohio

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Message Posted: Oct 14, 2014 3:09:52 AM

Winter will arrive I thought instead about installing say a 150+ # electric wench nearly a foot ahead of my vehicle 5000 Ft # capacity. Hope to improve the Aerodynamics with a cover, maybe lighten it a bit by using nylon cord instead of steel cable,(dream on it) awhile... Weld it on there!
Tucsonhomes
Champion Author Tucson

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Message Posted: Oct 13, 2014 2:12:33 PM

Keep the air pressure up in your tires
pilotdlh
Champion Author Minnesota

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Message Posted: Oct 13, 2014 10:15:55 AM

If there were any, the auto manufacturers would be doing them.
twt
Champion Author Virginia Beach

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Message Posted: Oct 13, 2014 3:33:48 AM

No "Jack Rabbit" starts. Also, use "Cruise Control" when possible.
forresj
Champion Author Wilmington

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Message Posted: Oct 12, 2014 8:05:46 PM

Put a "For Sale" sign on your windshield.
nru
Champion Author Twin Cities

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Message Posted: Oct 12, 2014 5:20:34 PM

Put a block of wood about 2 feet square on a post a foot in front of your car = or just put your front license plate on a long bolt with washers - aerodynamics will be your friend and you will get a mile or two more per gallon - don't forget about it or crash though. Sounds hillbilly, but works

[Edited by: nru at 10/12/2014 5:21:19 PM EST]
oilpan4
Champion Author Virginia

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Message Posted: Oct 12, 2014 4:36:07 PM

"Any physical modification or gas additive assumes you will change your driving style and delude yourself into crediting any improvement in MPG to the product you wasted your money on"

Gas additives are total junk.
Most things you can buy to put on gasoline powered vehicle are wastes of money too.
The modifications that actually work and save you money you have to build your self. Other wise the cost versus savings will not be realized for years.

"Okay, to be fair, if you have an 18 wheeler, tail farings have been shown to improve highway speed fuel economy."

So why do aerodynamic modifications only work on 18 wheelers and not autos?

If you think a vehicles fuel economy cant be improved upon and you think 25 or 35 mpg is a lot, that's ok because I know stupid cant be fixed.

If you are interested in increasing fuel economy of your gas, diesel, car, truck, suv or 18 wheeler check out http://ecomodder.com/ .

No one is selling anything and don't post any thing asking about HHO generators. There are HHO forums out there that pursue that nonsense.
rickr47
Rookie Author Twin Cities

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Message Posted: Oct 12, 2014 2:30:28 PM

turbo
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