The only gas savers that are worth spending your money on are the ones that convert your car to run with water. This is the only way you can significantly improve your gas mileage, and they are very affordable.

There are about 3 different products that are fighting for the top position into this kind of gas savers.

There is the first one that arrived on the market, Water4Gas

There is the new little favorite, RunYourCarOnWater

And there is my personnal favorite, that is really starting to take it's place, HalfWaterHalfGas.

Water4Gas is probably the most complete and detailed guide. It is about 180 pages long, and it includes many pictures to guide you through the steps. But it also contains many technical terms that you might not be familiar with.

Runyourcarwithwater is the shortest one. It is something like 90 pages long, which makes it easier to read. It includes a little less technical terms, but there are not enough images in my opinion.

HalfWaterHalfGas is just in the "proper middle". It is very well explained, without fancy words. And what this hho fuel kit offers that the others don't is a 24/7 support service. They are very prompt to answer.

Plus they are also including very nice bonuses :

• An Aesthetics tips guide
• A Maintenance Special Guide
• And a Tuning-the-easy-way guide

And it is 30$ cheaper than the water4gas one..