Back in the day when this bad Boss 429 was roaming the streets, some of the gas saving tips held true, but not anymore.

Your EGR is an integral part of your emission control system. EGR stands for Exhaust Gas Recirculation and it does exactly as the name suggests; recirculates some of your exhaust gas back into the intake manifold, where it mixes with incoming air. This helps lower combustion temperatures and as a result, decreases oxides of nitrogen (NOX) emissions.

Many people believe that plugging the EGR or bypassing it will in some way increase their gas mileage and give them a few more precious horsepower. Can simply bypassing the EGR give you better gas mileage? Can it be that simple?

No, it can’t. In modern engines, you will actually stand a better chance of losing a few percent in the MPG department, rather than making any gains. You really gain nothing by bypassing it. Your car actually does it for you under acceleration, when an EGR block swings into action to prevent it from functioning. So if you have a modern gasoline engine, forget the notion of saving a little bit of precious unleaded by just bypassing your EGR. It doesn’t work.

What about some other easy ways to get better gas mileage you may have heard about? You can always drive slower,but how much fun is that? No, I’m talking about tricks, like the 100mpg carburetor or the magnetic fuel molecule aligner. More to the point I’m talking about things that have been long reported to save gas, but actually don’t.

The first thing on the list is a having a clean air filter. That mileage myth has some basis in fact, but it no longer holds true. In the past, back in the glorious days of Holley double pumpers or Rochester Q-jets, a dirty air filter could cut back on your power and gas mileage. Now however a dirty air filter will still cost you power, but it won’t really hurt your mileage. Why not? Because now days cars are so much smarter. They use electronic engine management systems connected to a host of sensors to meter the fuel, rather than a bunch of venturis, tubes, and holes in some brass. As the air filter gets dirtier and the airflow decreases, the electronics compensate by also decreasing the fuel flow so the air/fuel mixture is always correct. The problem is that you’ll lose plenty of power, so don’t let that filter get too dirty.

Here’s another one; leaving the tailgate down in a pickup will save gas. Actually according to recent tests it doesn’t. Remove the tailgate entirely and put a net across the opening.

Still more old timers myths that are supposed to increase your gas mileage, but in most cases, do little or actually have a detrimental effect on it include the “put it in neutral when going down hills” piece of advice. Although this actually works in older cars, it doesn’t in newer vehicles. That’s because in newer vehicles the electronic engine management systems actually shut off the fuel flow entirely when you are moving forward with the throttle plate in the closed position. That is only true when your rig is in gear. When you put it neutral the fuel cut off is not in effect, so you’re burning gas. Keep it in gear, just take your foot off the gas, and your cars ECU will stop feeding your engine for you.

These are just a few things that people just know are true about ways to get better gas mileage; except they really aren’t.

There are a few reasons for the increased of most diesel engines when compared to gas engines. One reason for the lower fuel consumption is that diesel fuel has a higher energy density than does gasoline. For example, standard diesel fuel has an energy density of approximately 139K BTU per gallon. On the other hand, gasoline has fractionally less energy, about 125,000 BTU per gallon. As a way of comparison, much touted ethanol is far below either of these two, at about 85K BTU / gallon. That means that a gallon of diesel there has a greater ability to provide propulsive energy, if the efficiency of combustion is equal.

There is another primary reason that diesel engines tend to get better fuel economy than a gasoline power plant. This reason is due to the fuel delivery system of diesel engines; direct injection. Direct injection is more conducive to ensuring all the fuel atomized and is burned. Obviously more complete combustion leads to greater efficiency and lower fuel consumption. The same reasons have led to direct fuel injection systems being adopted for gasoline engines from various auto makers, including Cadillac, Saturn, Audi, and Pontiac. Expect to see wider adoption of this technology on gasoline engines in the near future as a way to decrease emissions and save fuel.

Differences in Power Delivery Between Gasoline and Diesel Engines

A diesel engine tends to develop power lower in the RPM range than an a comparable gas engine. In addition, the diesel will usually develop more maximum torque but less horsepower than a gasoline engine. This means that depending upon the use, the actual fuel economy figures from both gas and diesel engines can be very different indeed. Diesels are typically excel at lower, more constant speed operation while pulling heaver vehicles, while gasoline engines are better suited to lighter vehicles, variable speeds and rapid acceleration.

That partially explains the widespread use of diesel power plants in trucks. They will deliver much higher fuel economy than a comparable gasoline engine when towing heavy loads, and more easily climb steep hills when doing so. There are also durability advantages to diesel engines, especially in heavy duty applications. The operational differences between diesel and gas engines also helps explain the really high highway fuel economy figures returned by passenger cars with small, turbo diesel engines, such as the TDI powered VW Jetta (41 EPA Hwy MPG).

That’s why a diesel engine get better fuel economy than a gas engine.

Until next time………

The Splitfire spark plugs are still being made and sold by Old World Industries, Inc., Northbrook, IL. They rose to prominence because of their unique center electrode, which did its forked, snake-tongue impression. The thinking was that electrode design would lead to more complete combustion. When you visit their site today however, you’ll notice that their current line of plugs looks suspiciously like almost any other quality spark plug on the market.

Why is their site devoid of the original Splitfire plug from whence they derived their name? Why, indeed! It appears that in 1997 Splitfire’s advertising was making fuel economy and gas saving claims that went something like this:

A -“Of all users (regardless of vehicle type, age, condition, and use) responding:

70% reported a gas mileage increase of from 1 to 6 more miles per gallon.””

And

Consumer Endorser: “Yeah, I went from probably 300 miles on a full tank to almost 400.”

Consumer Endorser: “I probably was getting, I would say about 20 miles more per tankful, and that’s a lot for me!”

Consumer Endorser: “And when you’re driving a four-wheel drive vehicle, you need all the extra gas mileage you can get.”

The problem is that they couldn’t actually back up any of these claims to the Federal Trade Commission’s satisfaction. In 1997 they were hauled into federal proceedings by the FTC to substantiate their claims of increased fuel economy provided by their (at the time) $6 spark plug. Now not only was that about 5 times what a traditional plug cost at the time, some consumers had suspicions about the efficacy of the product. This resulted in complaints to the FTC, and well, you know what happened next.

From the FTC case report –

“In truth and in fact, respondent did not possess and rely upon a reasonable basis that substantiated the representations set forth in Paragraph 5, at the time the representations were made. Therefore, the representation set forth in Paragraph 6 was, and is, false or misleading.

Through the means described in Paragraph 4, respondent has represented, expressly or by implication, that competent and reliable studies or surveys show that 70% of SplitFire users achieve a gas mileage increase of from 1 to 6 more miles per gallon.

In truth and in fact, competent and reliable studies or surveys do not show that 70% of SplitFire users achieve a gas mileage increase of from 1 to 6 more miles per gallon. Therefore, the representation set forth in Paragraph 8 was, and is, false or misleading.

The acts and practices of respondent as alleged in this complaint constitute unfair or deceptive acts or practices in or affecting commerce in violation of Section 5(a) of the Federal Trade Commission Act.”

And I suspect that was the beginning of the end for the forked tongued devil. It just goes to show that while certain things have been shown to definitely increase your fuel mileage and save you a few dollars here and there, others can’t quite measure up, so do your research carefully, as there are many other devices out there with dubious records of saving gas. *Take note that bad, old, or fouled spark plugs can certainly cost you gas mileage, as can other worn out and/or dirty parts such as O2 sensors and air or fuel filters.

Actually, “the Environmental Protection Agency (EPA) has evaluated or tested more than 100 alleged gas-saving devices and has not found any product that significantly improves gas mileage. In fact, some “gas-saving” products may damage a car’s engine or cause substantial increases in exhaust emissions.” So much for magnets! As for anecdotal reports, you can’t trust any test that wasn’t done in a double blind fashion, under controlled conditions. There are actual performance parts that increase the engine’s efficiency and deliver better gas mileage, but usually the “gadget” type of product isn’t among them.

Until next time…………

]]> http://super-gas-saver.com/Save-Gas-Blog/2008/10/do-you-believe-the-gas-mileage-claims-in-advertising-the-case-of-splitfire-spark-plugs-and-more/feed/ 0 http://super-gas-saver.com/Save-Gas-Blog/2008/09/best-gas-mileage-vehicles-to-buy-if-you-have-a-large-family/ http://super-gas-saver.com/Save-Gas-Blog/2008/09/best-gas-mileage-vehicles-to-buy-if-you-have-a-large-family/#comments Mon, 15 Sep 2008 14:04:07 +0000 http://super-gas-saver.com/Save-Gas-Blog/?p=68

There a many cars that get great gas mileage. Many are even affordable, fun to drive, and reliable too. The problem is that if you need transportation for a family of 6 or more, many of these vehicles just don’t cut it. A Mini Cooper S may be a great car for the daily commute or running a canyon road, but trying to fit a family of seven in one is akin to practicing for a circus act.

What do you do if gas bills are killing you, but you really can’t drive a Honda Fit, Mini Cooper, or Prius Hybrid? What if your transportation duties run the gamut, from running 3 or 4 kids to school, soccer or swimming, picking up 10 bags of groceries, and running the whole family for weekend trips to Grandma’s? Even a normal sedan, such as an Accord or Taurus just isn’t big enough.

Here are the top vehicles to drive if you have to move more than the average number of people and their gear.

Best Gas Mileage Vehicles to Buy if You Have a Large Family #6

2009 Chrysler Town and Country Minivan – 4.0L V6, 6-sp auto, 17city / 25highway / 20 combined MPG, Base MSRP: $24,195.

The latest from the ones who started the minivan revolution (but didn’t actually invent it, that goes to VW), the latest Town and Country comes in at number 7 on the list. It also demonstrates the importance of an advanced transmission (see my post on technology to increase fuel economy) in the quest for better gas mileage. The 4 liter engine with the 6-speed actually gets better EPA fuel economy ratings than it’s smaller engined counterpart, which is mated to only a 4-speed auto.

The relatively good mileage, coupled with the utility of such innovations as Chrysler’s “Stow-n-Go” seating make this one a winner if you have a large family and need to get them around town.

Best Gas Mileage Vehicles to Buy if You Have a Large Family #5

2009 Ford Flex Crossover SUV, FWD – 3.5L V6, 6-sp auto, 17 city / 25 highway / 19 combined MPG, Base MSRP: $28,295.

One of the main reasons so many drivers eschewed minivans in favor or SUVs in the last decade and a half is that they don’t want to be perceived as dowdy, un-cool, or devoid of style. Well driving the new Ford Flex definitely won’t get them pigeonholed into any of those categories. It drips of style, but still delivers enough room inside to get the whole brood to their little league practice and the swim meet without having to sit atop one another.

The Flex is a (very) modern interpretation of something right out of So Cal in the ‘50s. It’s not a minivan, but replaced on in Ford’s lineup, the never really popular Freestar. In a land of all the same, derivative products, Ford looks to have broken the mold for large family transportation. All that and it has suicide doors and returns very respectable gas mileage for a quasi-large people mover.

Best Gas Mileage Vehicles to Buy if You Have a Large Family #4

2009 Mazda 5 Minivan FWD – 2.3L I4, 5-sp auto, 21city / 27 highway / 23 combined MPG, Base MSRP: $18,665.

The 2009 Mazda 5 has one real ace in the hole; great fuel economy for a vehicle that can hold your entire family. It also looks pretty cool, with little of the boring, me-too styling that so many others in the genre find themselves draped in, and you can get one at a bargain price compared to other vehicles that can hold 6 people. It has two things going against it that kept it from finishing higher in this list of great vehicles for transporting a large family while getting excellent MPG; it really isn’t that large, and it really isn’t that quick. In fact part of the reason it gets such great fuel economy is a result of precisely those two traits.

If you have a family of 6, and 2 of the family members are small kids, this will definitely do the trick. It handles well, a hallmark of most Mazda products, and should be very reliable, if past reliability stats are any indication. If your group includes teenaged twins that happen to play tight end on the high school football team and a few more kids over about 10 years old, you should probably find another mode of transportation however. The Mazda will simply be too tight of a squeeze.

Best Gas Mileage Vehicles to Buy if You Have a Large Family #3

2009 Chevrolet Traverse FWD – 3.6L V6 direct injection, 6-sp auto, 17city / 24 highway / 19 combined MPG, Base Price MSRP: $30,810.

The Chevrolet Traverse is the latest iteration of the GM large SUV platform that’s also spawned the GMC Acadia and the Saturn Outlook. It’s modern, with a 3.6 liter V6 that includes direct injection fuel delivery, one of the reasons a 288hp vehicle that transports 8 full sized people can get such good gas mileage (for this sized vehicle). The interior is modern as well, proving again that American vehicles can deliver in this department, even if it took 30 years for U.S. automakers to figure it out.

The 2009 Traverse has a great combination of ride and handling for such a large vehicle, and is by most reports, relatively quiet too. All in all it’s a great place to spend time on a long road trip with the entire family, providing you can still afford to take one, with the high price of fuel these days. At least the Traverse burns regular gas, currently the least expensive liquid motivator you can get at the local filling station.

Best Gas Mileage Vehicles to Buy if You Have a Large Family #2

2009 Honda Odessey LX Minivan FWD – 3.5L V6, 5-sp auto, 17 city / 25 highway / 20 combined MPG, Base MSRP (LX version): $26,255.

Honda has wrought a vehicle that consistently finishes at the top of its class with the Odyssey minivan. Honda has always created spectacular power plants, and the 3.5 liter in the Odyssey is another example of one of their sewing machine smooth, internal combustion, creations. The only nits that kept this one from finishing even higher on the list is that it’s a mite noisy on the freeway and could be a bit larger if you’d like to transport 7+ people. It has a cockpit that is a fantastic place to spend time, with everything falling readily to hand, and large, easy-to-read instrumentation that’s been a hallmark of Honda binnacles since the early ‘80s. The Odyssey even handles fairly well for vehicles in the minivan category.

Best Gas Mileage Vehicles to Buy if You Have a Large Family #1

2009 Chevy Tahoe SUV Hybrid 4×2 – 6L V8, CVT, 21 city / 22 highway / 21 combined, Base MSRP: $50,490.

The new hybrid Tahoe is a technological tour de force, enabling a huge, vehicle with a 6 liter V8 engine to return 20mpg. If you have to have a large vehicle to transport 8 people, and all their stuff, on a long trip, while towing a trailer, this is about the only vehicle to be driving. It uses a hybrid power train, combined with advanced transmission technology to wring every last bit of energy from a drop of unleaded regular and use it for getting down the road. About the only downside, and it’s considerable, is the monster MSRP of $50,490. That’s for the 2-wheel drive version; you’ll pay more to deliver power to all the wheels, should you want to.

The new Hybrid Tahoe is really expensive, but if you need the combination of this much size and towing capacity, nothing else makes the list while delivering anywhere close to this kind of fuel economy, especially if you do much of your driving in urban areas. In stop and go driving the hybrid power really comes into it’s own and saves gas. It comes with every option under the sun, and if you check all the boxes, you can rapidly find your bank account depleted by an even larger sum, so exercise some restraint.

Until next time………..

Making the best gas mileage cars is at the forefront of every auto manufacturer’s agenda these days. Big trucks and full sized SUVs languish on auto dealer’s lots throughout the country, as consumers look for something that will save them money on gas, rather than draining their 401k to fill their tank. Car manufacturers have responded as best they can but lead times on new vehicle models are measured in years, not months.

Developing and implementing new gas saving technologies and staying within the ever changing regulatory framework takes time, and there’s not much the manufacturers can do about it. Those of you thinking that the Big 3 passed on the 100-mpg carburetor because it was too expensive, or that it was suppressed by the oil companies should take this time to remove your cranium from which ever bodily orifice in which it’s buried.

General Motors alone employs over 6,000 power train engineers in an attempt to develop powerful, efficient, quiet and smooth engines and transmissions that consumers want to buy. You should ask yourself why:

A) None of these bright star engineers have stumbled on the formula for the esteemed, 100mpg carburetor?

B) GM has squandered hundreds of millions of dollars developing fuel delivery, engine management, and other technologies that deliver increased fuel mileage, reduced emissions, and smooth running engines if they could have just cut a deal to fast track the 100mpg carb?

C) The whole 100mpg carb idea just doesn’t pass the smell test. You’re not going to get 100mpg, good power, a smooth running engine, and low (actually almost non-existent these days) emissions by simply swapping a carburetor. Also consider that no carburetor equipped vehicles are manufactured by major auto manufacturers any longer, and haven’t been for about a decade. There’s a reason for that.

Since the 100mpg carb isn’t going to be around to increase the fuel economy of vehicles, let’s take a look at the new technologies that are being used to save you gas on your daily slog to work.

The Top Technologies Used to Get Better Fuel Mileage 6 -

Cylinder Deactivation – This is the technique of cutting off certain cylinders when the power isn’t needed. In many cases the valves are closed to reduce pumping losses. There are many different names for this; Chevy calls theirs Active Fuel Management™, Chrysler marketing gurus came up with Multi-Displacement Engine, and Honda likes Variable Cylinder Management™. This is a very nice way to use modern engine management systems to really manage the engine in a quest or better fuel efficiency. Depending on how you drive, you’ll save about 10% – 15% on your fuel bill over a comparably equipped vehicle without cylinder deactivation technology.

The Top Technologies Used to Get Better Fuel Mileage 5 –

Multi-Speed, electronically controlled automatic transmissions and Continuously Variable Transmissions (CVTs) – The advent of extremely sophisticated vehicle management systems have allowed electronic control of your vehicle’s transmission to the n’th degree. The greater amount of transmission control and coordination with the engine, coupled with the increased number of ratios offered by many transmissions (an infinite number, in the case of the CVT), allows large increases in gas mileage. As an example, the new 2009 Chevy Impala 4-cylinder went from an EPA 30mpg highway to 32mpg with the change from a 4-speed automatic transmission to a 6-speed unit.

The Top Technologies Used to Get Better Fuel Mileage 4 –

Turbocharged, small engines – Turbocharging technology coupled with smaller displacement engines has experienced a resurgence in the last couple of years. Acura for example has offered their first turbo engine, the turbo 4-cylinder found in the new Acura RDX small SUV (You’ve got to love a vehicle named after the explosive that’s the basis for the military plastic explosive C-4).

The increased capability of sensor and engine management, fuel delivery, and ignition systems, combined with better materials technology and improved combustion chamber designs, have breathed new life into the turbocharged engine. The added expense and weight of the turbo and its’ associated plumbing can’t really be justified when gas prices are low, but if they stay over $3.50 a gallon, expect to see the turbo / small engine combo stick around for a while.

The Top Technologies Used to Get Better Fuel Mileage 3 –

Engine cut off / restart – Your car never gets better mileage than when it’s not running (infinite mpg), and it never gets worse mileage than when it is running but not moving (0 mpg). Now, what’s good enough for your golf cart moves into the realm of automotive normalcy with the adoption of auto engine cutoff / restart technology.

Used by most hybrids, this changes your vehicle from living in the domain where it gets the absolute worst mileage to the one where it gets the absolute best. That change adds up to increased gas savings and better overall gas mileage with the improvement coming in city driving, the bane of most vehicle’s fuel economy profiles.

The Top Technologies Used to Get Better Fuel Mileage 2 -

Direct fuel injection – As I mentioned earlier, there hasn’t been a non-fuel injected car sold in the U.S. for about 10 years. Most cars now use port fuel injection, where fuel is injected into the intake port, right behind the intake valve. With direct injection, the fuel is injected directly into the cylinder using high pressure fuel injection systems. This gives three big advantages; The cooling effect of the fuel allows higher compression ratios for increased engine efficiency, more precise fuel timing and delivery is possible, and better fuel atomization is realized. These add up to an additional 10% – 15% in fuel economy, often coupled with better drivability and more power.

The Top Technologies Used to Get Better Fuel Mileage 1 -

Hybrid power train technology- You probably saw this one coming a mile away. With the Hybrid Prius’ popularity (even though I personally prefer the Honda Civic hybrid) of late it’s hard to Escape (hey, isn’t that another hybrid) the conclusion that combining both an internal combustion and electric power plant with some of the technologies mentioned above will lead to much improved fuel economy, especially in city driving. Looking at most manufacturer’s best gas mileage cars, it’s fairly obvious most of them are some variation of hybrid.

The hybrid’s ability to recapture heretofore lost energy through the use of regenerative braking, it’s ability to move at lower speeds purely on electric power and the ability to shut off the engine completely when stopped really deliver far better city gas mileage. Soon hybrids will be implemented with small, common rail diesel engines to deliver even greater fuel economy, possibly on the order of 60 – 70mpg in the city.

These are the technologies used to make the best gas mileage cars. There are certainly improvements coming as these technologies are refined. In addition several promising, new developments are on the way in the not too distant future that will make the best gas mileage cars in the next decade fairly embarrass even the best hybrids of today. In fact the vehicles that do burn fuel probably won’t burn gas at all, but some sort of biodiesel.

Until next time…….