Fuel Doctor really does improve fuel efficiency and saves money. Before the FD-47: 30 MPG. After the FD-47: 32 MPG! I would recommend the Fuel Doctor to a friend or family member

- Scott R., Georgia

Well, after a full 30 day trial of the Fuel Doctor, I have to say that I am overwhelmed by the increase not only in my per-tank mileage but also in my uptick in horsepower! Prior to the Fuel Doctor, I was averaging approximately 280 miles per tank. Since installing the Fuel Doctor (quite possible the easiest installation on the planet!), I am not exceeding that number but blowing it away by 25% or 350 miles per-tank-full. Now, 350 seems like it's going to be the average very soon...as long as I keep the Fuel Doctor plugged in! I want to thank you for including me in your test...I am not only recommending it to not only my family and friends but also my colleagues!

- William S., M.A., LUTCF

I have to say that I am very impressed with the Fuel Doctor- I have been using the product for two months now and my average per tank of gas prior to using the product was approximately 260 miles per tank. Since installing the Fuel Doctor, I am averaging 360 plus miles per tank full. I want to thank you for including me in you test. I have told hundreds of friends, family and colleagues and they are waiting for the product to hit the market. Good Luck!

- Vince C., President & CEO of Steffanino's, Inc.

The Fuel Doctor is amazing! It was effortless to install. I immediately felt an increase in acceleration in my 03 Tahoe. I am also getting 70-85 additional miles per tank. I am saving over $400 a year, so I’m recommending it to all my friends.

- Chris B.

I was a skeptic about the Fuel Doctor claims. Since there is a money back guarantee, I decided to give it a try? The results blew me away. I have a 1997 F150 and noticed I always get a range of 12 MPG City & 17 HWY. My average is 14.3. Within a week I have noticed an average of 18.7 MPG. That is a 4.4. MPG increase over the same route I always take. Thanks.

- Stanley S.

I tried the Fuel Doctor on my 2002 Toyota Sienna V-6, with over 163,000 miles. I usually average 22 MPG, but with the Fuel Doctor I averaged 25 MPG. In today’s economy, that extra 3 MPG goes a long way with all the driving I do. Thank you!!!

- Julia S.

I own a 2003 GMC Yukon XL that has 158,000 miles. Since using the Fuel Doctor my vehicle shifts much smoother not to mention I have also noticed that I have filled up at the gas station less. My mileage has consistently increased by 3-5 mile miles per gallon depending on the type of driving. Thank you Fuel Doctor!!!

- Steve Y.

I have owned a Limousine company for several years and keep accurate records on the mileage of my fleet. In my business, fuel charges are one of my top expenses every month. Since using the Fuel Doctor, I have noticed a modest change of 6-10% in traffic, but have noticed a much greater change on the highway when driving. With the prices of fuel fluctuating constantly, it is great to know that regardless of the price of fuel, I have something that will help me reduce my costs. Thanks.

- Arsen M., Arse Starr Express Limo