Everybody who has a license passed it - the driving test. Some passed their first test, some passed their fifth. The common thing about everyone is that they made mistakes. For sure. There is no perfect driver, and as a result no perfect driving.

However, some mistakes repeat more than others. Examiners keep telling students about their mistakes, but with no hope - students still make the same old silly mistakes. Those mistakes are easy to avoid if you know what you do.

One big mistake is not making complete stops. Many students "roll" through the intersection without completely stopping at the limit line. This is more serious on right turns on red light. Many students forget to make a complete stop and just slow down, make sure traffic is clear, and continue. This is wrong and fails many students. Not to mention it is highly illegal, and when driving alone it can award the non-stopper with a big fine.

Another problem students have is lane changes. In theory, going from one lane to another is the easiest mission on earth: you signal, check that the area is clear, and move into the lane you want. For some people it is not very easy, and they often reach a situation of a near-accident. This, of course, is an automatic fail.

Lack of confidence and over-caution are two reasons that also fail many applicants. They tend to think that if they drive under the speed limit, they are safe. There is nothing further from the truth. Slow driving is a critical error, an error that means an automatic fail. Also, if the examiner tells a student too shy to take his turn on a stop sign what to do, the test is also over.

The key to avoid all these mistakes is practice. The old cliche, "Practice makes perfect", is the best advice for driving and learning to drive.

As a consumer it is an undeniable fact that gasoline prices continue to rise in America. Gasoline prices continue to rise for several reasons. The Economy's instability, War in the middle east, fears over demand and OPEC's ability to meet demand supply are just a few of these reasons. America is extremely too Dependant on foreign oil to meet the supply demands of our ever growing society.

If you are one of the many looking for solutions to high gas prices? Here are some suggestions:

Perform regular, routine maintenance on your vehicles. Here's why. A dirty air filter can reduce gas mileage and efficiency by 40%. Tires that are above or below recommended air pressure can affect gas efficiency by as much as 2%.

Change some of your driving habits. Speeding is a major killer of gas efficiency. Going an average speed of 55 miles per hour can cause a difference of gas efficiency by 25% compared to traveling a speed of 75 miles per hour. Some other solutions to high gas prices are: use cruise control whenever possible, keep the weight of items in you vehicle to a minimum by carrying only the items needed. Keep your windows closed, it actually decreases gas mileage compared to using the A/C. Remove items such as luggage racks that decrease the aerodynamics of your vehicle. Avoid aggressive driving and stop and go traffic are some other solutions to high gas prices.

As gas prices soar and fuel efficient technology changes those of us driving older vehicles with less fuel efficiency should highly consider purchasing a newer vehicle. One could either purchase a fuel efficient hybrid or consider modifying your current vehicle to improve fuel performance. An inventor by the name of Stan Meyers has even found a way to get your car to run on water

Believe it or not the traditional troubleshooting charts should be leading you to mistakes.

How is it possible? It is easiest than you may figure out!

A very common way to diagnose an engine is by looking the spark plug firing tips because its appearance can reveal if your engine has a problem that need correcting.

But you need to be aware that the same spark plug firing tips appearance can have different root causes:

A) Mixture or timing misadjustment or other probable mechanical troubles.

B) Different traffic, weather, particular driving and /or engine operating conditions among others that affects the performance.

Unfortunately the traditional spark plug troubleshooting charts, only are considering as possible trouble causes: the first list A, for each spark plug firing tip appearance.

Never had included in its diagnostics that when the vehicle is functioning in one or some of the conditions listed in B, (that are very often); the combustion chamber temperature is affected, making that the stock spark plug heat range results too hot or too cold for these operating conditions, consequently their tip appearances will show those effects, which could be confused with the effects of mixture or timing misadjustment or other probable mechanical troubles.

For example: in a vehicle that is towing a trailer in a heavy city driving have to perform a extra engine's charge to fight against the resistance of the weight, very often should overheat and it is not due to a wrong regulation or a mechanical trouble, neither because the radiator is not enough big. It is simply because the stock spark plugs, suggested by the manufacturers at the production line results to hot to this operating condition.

The different operation conditions that infludes in the operating conditions of an engine are much more frequents than most of the people may figure our, as reveals a report of the US Department of Transportation - DOT.

As result of this lack of information, the true importance of the heat range of the spark plugs becomes in a confused and uncertain concept, never sufficiently taken into account. Forasmuch, it should not surprise that even experienced mechanics are making wrong diagnostics, because most of them are confusing a lean mixture with an overheated spark plug owed to some operating conditions, like hauling a trailer; because the appearances of its firing tips look exactly the same. They can not either distinguish when the stock spark plug results too cold for some particular driving or operating conditions, like when driving at consistent low speed; from when has a rich mixture, because both have the same carbon fouled firing tips appearance.

And the worst! Those wrong diagnostics are leading them to wrong solutions, engaging in repair nonexistent and expensive mechanical troubles or unnecessarily trying to adjust the air-fuel mixture; instead of simply customizing the spark plug heat range to the particular driving or operating conditions that is the unique right, fast and cheap solution.

Additionally, because most of the people doesn't have guide, neither method, nor tool that allow them to customize accurately the heat range of the spark plugs, the real importance of the spark plugs heat range becomes in a confused concept, which only has been leading the mechanics to mistakes when they are reading their spark plugs.

So, any time a traditional spark plug troubleshooting charts mention "wrong heat range" or "check for the correct heat range", being so unclear, a great majority of them are quite familiarized with the concept that "wrong heat range" only could be a spark plug different than the stock or the suggested by the manufacturers, ignoring that they should customize their tune-up simply by switching the spark plug's heat range.

You can't continuous wasting money in excess fuel consuming and paying bills for expensive repairs due to wrong diagnostics delivered by incomplete troubleshooting charts.

You must be sure you are correctly reading your spark plugs, exactly understanding what the spark plug's firing tips are telling you, troubleshooting your spark plugs with precision, and properly diagnosing the real root causes of your engine's failures.

To reach this exactitude you must use only the most complete troubleshooting that is considering all the real possibilities that can be the cause to any one of the spark plugs appearances, and that quickly, easy and properly identifies if the actual root cause of any tip's appearance is due to a mixture or timing misadjustments or other probable mechanical trouble, or due to the particular driving habits and/or engine operating conditions that makes necessary to change the spark plug's heat range. With this critical information you will be in the right way to precisely fine tune your loved engine.

Where you may find it?

This is the question of the million!

Recently was introduced to the market the unique tuning device on the planet that allows you to properly manage the powerful heat range function of the spark plugs, telling you how many heat ranges you must switch to customize your vehicle to your particular driving habits and/or engine operating conditions, to increase the performance, achieve the best fuel economy, ensure reliability, extend the engine's life and reach the lowest emissions.

Fine tuning you engine by using the right tool is now easiest and accurately than ever.

You have the decision at your hands now.

There is some debate going on about how to make an efficient and cost effective water-fuel system for vehicles, as well as home appliances. Many people are quite skeptical about water-fuel systems, HHO or hydro-fuel technology (or whatever you wish to call it) for domestic use. However, there are numerous companies beginning to offer water-fuel kits which can be adapted to vehicles or manuals guiding the consumer on how to do it himself.

Here, we will attempt to explain the concept and technical workings of water-fuel and HHO systems and then investigate what the consumer should be looking for when evaluating the various systems on offer.

Frequently, water-fuel technology is founded on splitting water actually in situ, on board a vehicle. It then utilizes the resulting split hydrogen and oxygen gases not to power the vehicle, but rather to increase the efficiency of its gasoline (petroleum) combustion. Vehicles running solely on water encounter some basic difficulties which are problematical to surmount, while a system that reduces gas consumption maintains the vehicle's performance while increasing miles per gallon by up to 50%.

Most water-fuel technology is designed as do-it-yourself systems. That's nothing to worry about; it's what normally happens with great new ideas in their infancy. You should find that any decent system will be especially engineered with beginners in mind, for people with no or little automotive experience. Generally no specialist auto tools should be required and costs are kept to an absolute minimum. A finished and fully functional system should come in at a price tag of under $120. Installation time is normally well under an hour if instructions are followed properly.

Most importantly, any decent HHO system should be able to be removed within a minute or two, without in any way affecting the normal or pre-existing operation of the vehicle. No modifications to the factory-installed engine should be required, nor to their computer and fuel injection systems. Virtually anyone should be able to install an HHO system and with no concerns that it will in any way adversely affect their vehicle if they decide they don't want it. It effectively means anyone can have a go.

As far as the water fuel technology is concerned, if you've never fitted such a device before, it is probably best to look for a unit where the electrolyzer, bubbler and water reservoir have all been combined. It will save time and complications. You can find suppliers via the link at the end of this article.

Keep an eye out for systems incorporating coiled or spiraled electrode wires as opposed to flat plates or spiraled plates. The magnetic vortex generated by a coil improves water splitting. This means that less power will be drawn from the vehicle's electrical system, improving overall efficiency and reducing costs even further.

A number of major factors all complement each other in producing an efficient split of water into hydrogen and oxygen. These include direct current flowing via electrode wires to the water, the magnetic vortex produced by the shape of the electrodes, along with the vacuum caused by the engine. All these factors work to produce a more complete and thus effective combustion.

So what if combustion is improved? What's the big deal? Well, two things are obvious. Better combustion equals better MPG which, in turn, equals a heavier wallet at the end of each week. And secondly, improved combustion means fewer emissions and thus less pollution.

Let's have a look at a couple of facts. Virtually all modern-day gas powered internal combustion engines are only around 75% efficient. Improve that figure to very near 100% and the financial benefits become obvious. Then, around 80% of gas used in an average family car goes not to power the vehicle at all, but, because of the design, is instead unburnt, producing pollution and carbon emissions.

Hybrid water and gas powered motoring is now so easy, cheap and risk free, it is a wonder that so few of the population have taken advantage of its financial and environmental benefits.