In this article we will reveal our research on finding the devices that are tested by EPA and show a considerable reduction in gas mileage and does not affect harmful emissions adversely. Again note some of the products may not be available in the market at present. EPA however has a legal disclaimer for all such products as follows:

"certain conclusions about possible gas savings by testing the product or by evaluating the manufacturers' own test data" have been reached by EPA. Remember that EPA never endorses a product.

AUTOTHERM

Idling can cost up to one gallon per year! And it is true that we have to spend a lot of time idling. So how do you keep your engine warm without wasting gas in idling? Well the Autotherm Energy Recovery System uses the vehicle's heater or fan to heat or cool the engine during winter or summer without keeping the engine on. This reduces emission and improves fuel economy. In 1985, this device was tested by the Air Force.

The benefits of the device also include:

Less carbon monoxide production.
Low maintenance cost.

Engine coolant is pumped by a circulator through the heater core of the vehicle and utilizes the heat in the engine that is actually residual. This device is truly very helpful for those who spend a lot of time waiting at the road side for example the police cars or fleet of transportation vehicles.

P.A.S.S. Kit

Cartel products manufactured the P.A.S.S kit. It functions the same way was PASS Master discussed in the previous article. The EPA did not test it separately but had rather used the results of PASS Master test to determine the feasibility of the P.A.S.S kit.

IDALERT

In 1981, IDALERT was tested. It is considered to be a device similar to AUTOTHERM and saves the gas consumption that takes place in idling. This device is meant to warn the operator whenever there is unproductive idling in the vehicle. The various ways the alarm warns the operator includes buzzing, warning lights going on and off and finally the horn goes off automatically if the buzz and the lights fail to draw the attention of the operator.

Kamei Spoilers

A spoiler is generally fitted in the front of the car. It has the following advantages:

Reduces sensitivity to cross wind
Gives better directional stability
Established more adhesion to the road
Reduces air drag
In short, increases the aerodynamics of the vehicle.

This device is said to reduce gas consumption by 0.3% to up to 3%. There is no concern related to the emission standards of a spoiler. How do you install a spoiler?

The device is fitted using only six screws.
A ground clearance of a minimum of five inches to a maximum of 9 inches is maintained.
Made of ABS plastic, spoiler can be painted to match the body of your vehicle.
Fiberglass spoilers are also available.
It starts from $50 and goes up to $500.

If you are looking at devices to increase the aerodynamics of your vehicle, then there are more attachments other than spoilers that you can explore.