Save Gas! – Cheat The Gas Nazis
Let’s start by telling you something you already know: gas prices are at an all-time high. It’s also no secret that Jeeps aren’t the most fuel efficient vehicles we could drive, yet we do in spite of escalating fuel costs. We constantly see advertisements that promise to increase your fuel economy for only $39.99 or whatever. Well, all this time, we’ve figured that they were just a bunch of snake oil, but after being inundated with new ads and paying almost $1,000 a month in gas, we decided to get ahold of the various different gas-saving items and test them in our project Jeep, Red.
For comparison sake to your Jeep, Red is our 4.0L ‘01 TJ with an NV3550, AEM Brute Force air intake, 4 inches of lift, 35-inch tires, 4.56 gears, a rear Detroit Truetrac, front ARB Air Locker, A/C, a Warn 9500i winch, soft top, and rear tire carrier/bumper. We started testing with 115,887 miles on the odometer, and as of press time, have 124,056 miles on it.
For purposes of this story, we rate a “significant” change as anything that gave us a 1 mpg or better average increase. Anything less, we deemed “not statistically significant.” After each item was tested, it was then removed and a tank of gas was run through the Jeep before the next test occurred. We present the tests here in the order we performed them.
Claim: Reduces surface tension of fuel droplets, enabling it to burn more completely. As an added benefit, it is supposed to clean carbon buildup from the engine.
In use: Add about 1 ounce of acetone per 10 gallons of gas.
Observed gains: On the first couple of tanks, we saw some decent gains. After two or three tanks of gas, though, we were back to roughly the same mileage we saw before for no statistically significant gain.

We had some really aggressive mud tires on the Jeep and decided to swap them out for a less aggressive all-terrain tire in the same diameter. We didn’t expect to see as big of a gain as we did, but we saw about a 1.5-mpg increase.
Claim: “Its airflow dynamics create a swirling, fast-burn effect in the combustion chamber thus creating finer particles (atomized fuel), allowing better flame propagation and more complete combustion.”
In use: Put the unit in our air-intake tube, put the intake tube back on the Jeep, and go.
Observed gains: Not only did we see no significant mileage gains, but we felt as if there was a decrease in power; hills along the normal commute to work that we used to be able to pull in Fifth gear, we ended up downshifting into Fourth to maintain speed.
Price: $64.95
Claim: “The strong magnetic charge the EPM [Engine Performance Maximizer] puts into the fuel, air, and coolant gives your fuel a complete and clean burn so that you can take advantage of increased horsepower with reduced operating expenses. Ten-25 percent on average fuel savings, depending on the age of the engine,and an 83 percent average reduction ofhydrocarbons.”In use: Apply magnets to the fuel line, coolant hose, and air tube.
Observed gains: Even with magnets on the fuel, coolant, and air intake tubes, we noticed no significant gains with Red.
Price: Not available at press time
Claim: “While we make no scientific claims about their use, several of us have tried this on various vehicles with varying degrees of ’success.’”
In use: Attach to fuel line going into the fuel rail and forget about it.
Observed gains: K&J was great on the phone and obviously knows its magnets. We got some additional rubber-coated neodymium magnets with our order, as well. While its magnets are really strong, reasonably priced, and have got an awesome selection, the Fuel Mag returned no gains on Red.
Price: $15
Claim: “The Fitch Fuel Catalyst transforms gasoline and diesel into a superior quality of fuel, allowing a combustion engine to extract the maximum amount of energy with minimal emissions.” The company makes no solid numerical claims, stating simply that the catalyst will “improve fuel economy.”
In use: The Fitch inline kit included hoses to tie into Red’s fuel rails, the Fitch inline canister with catalyst, mounting brackets, and even the tool to remove the fuel line from the fuel rail.
Observed gains: We noticed an approximate 2-mpg increase over stock with the Fitch system.
Price: $327.95
Claim: “The system operates by injecting platinum, in vapor form, into the gas/air mixture to burn (the fuel) more completely in the engine.” While they do claim an average 22 percent increase, the company also notes that your mileage might vary, But they have a 90 day money back guarantee
In use: After mounting the solution tank and using the included T-fitting to the brake booster vacuum line, we added a small vial of platinum solution, which needs to be added every 6,000 miles.
Observed gains: We saw approximately a 2-mpg increase.
Price: $239.99 for approximately 30,000 miles of solution.
What you might not realize is that from the time this is written to the time you read it can be anywhere from two to three months. We’re going to combine some of the things we tested to see just how much economy we can get out of Red. Check out the up-to-the-minute chart on www.jpmagazine.com if you want to see the actual numbers we used for our calculations, as well as the final results of the product stacking.
We stacked the Fitch Fuel Catalyst with the Platinum Fuel Saver, both sets of magnets, and the all-terrain tires, and even though we didn’t notice a statistically significant gain from the magnets, we didn’t notice a decrease, either, so we also left them on; however, we removed the Tornado. Despite not noticing a significant mileage increase or decrease, the downshifting was enough for us to exclude it from the stacking. We are hoping for 20 mpg but aren’t holding our breath.











