Certain 3rd-party testing may be available to verify what BGM Tabs can do for you. If you require this kind of testing -- as a trucking company might -- please get in touch and I'll send you what I can.
In the meantime, we have testimonials by current users, and the following personal test by one of our Agents. The following is anecdotal, as it refers only to one person's use. But you'll see that he's been pretty rigorous about how he tested the Tabs.
Agent Test of BGM Tabs
by Steve McCardell
When I first started looking into gas tablets -- a product that was supposed to give me increased gas mileage, boost my car's horsepower, and help my car to produce fewer emissions -- I was hopeful, open-minded, and skeptical all at once. And I always think that this is the healthy approach to have for something new. If we weren't hopeful and open-minded, we'd never progress. But if we weren't skeptical, we'd get misled all the time.
One thing about me is that, when I'm testing something -- even if I want it to work -- I play devil's advocate AGAINST it, to see where I can find its weak points. This way, if I find that it works, I'm convinced about it.
So here I came across BGM Tabs, and even though the company has done plenty of 3rd-party testing, I wanted to see for myself that the tabs did what they said at least in terms of gas mileage. The company guarantees 7-14% better gas mileage. It's possible to get more, but they don't want people anticipating more. And when you read about the gas tabs opportunity, all the numbers I crunched were at a conservative estimate of 10% better gas mileage.
NOTE: The directions suggest using 2 BGM Tabs the first time you use them. I didn't realize this and only used one. As you'll see, I added the second Tab part way into my first tank.
Now, my car has an MPG computer built in, but I wanted to test the numbers in a couple of ways, to make sure I was getting an honest estimate of improved gas mileage from the tabs, if indeed they worked.
To begin, I hadn't reset my MPG computer in probably more than a year. So I know that combining city, highway, and idling times for running the heat or AC ... adding all those up, I was getting about 16.9 MPG, which isn't bad considering that I drive a full-time 4WD 8-cylinder 4Runner.
To compare apples to apples, I then filled up my tank with NO TAB, and when the computer estimated that I had 350 miles to go before hitting empty, I reset my MPG computer to find out two things:
1) When the computer thought I had only 50 miles before empty, how many miles would I actually have traveled? (The full 300, or less?)
2) What would my calculated MPG be at that time?
After that first tank with NO TAB, here were my answers:
1) I traveled 276 miles from "350 to empty" to "50 to empty." In other words, I didn't go the full 300 miles that you would have expected from its projections.
2) My calculated MPG was 17.2 MPG. In fact, this included NO highway miles. I was making a concerted effort not to park and leave the engine running (this was done just a couple times for a few minutes) and to not waste gas with quick accelerations. I avoided as much stop-and-go as I could by anticipating lights, coasting towards red lights so I could minimize braking and acceleration, etc. In other words, I was playing devil's advocate, making sure I got as many miles as I could while not using the gas tab.
Incidentally, these numbers are very closely to Toyota's estimated MPG for the 4Runner:

As you can see, they expect you to get 14 city, 17 highway in a 2008 4Runner. Mine is a 2006, and they expect 14/18 overall. I was getting 16.9 over a long period of time and 17.2 over a single tank when I was being especially conscious of my mileage.
I certainly don't drive all highway miles, and for this one tank, didn't drive ANY. I do, however, drive every day on some 50 MPH roads before getting into the slower downtown area; so I have a good mix of fast and slow roads.
Once I reached "50 to empty," I went ahead and filled up again WITH A BGM TAB, and when I reached "350 to empty," I reset my MPG counter and my odometer. I purposely did this at a dead stop at the bottom of a hill in town, so that the first thing I faced would be slow roads, lights, and other taxing scenarios for MPG. Afterwards, I would hit faster roads on my way home.
If I were to get a 10% gas mileage increase over my "NO TAB" tank, I would end up with 18.9 MPG at the end of this experiment. Starting in town as I did, then traveling home, I got 18.4 MPG in my first 5 miles. But of course this wasn't a full test. What would happen over the next 300 miles or so?
My test progressed, and after 70 miles, I was getting 17.9 MPG -- an obvious improvement, but not what I was hoping for. BUT ... that's when I realized that I should have used 2 tabs in the first tank. (This speeds up the engine-cleaning process.) I then went and added one more tab to the tank to see what would happen for the rest of this first tank.
FIRST TANK TEST RESULTS
By the end of the first tank I was up to 18.7 MPG -- a 9% improvement in MPG. And from "350 to empty" through "50 to empty" I got exactly 300 miles, which was 24 more miles than I got the first time.
Cost Savings: From one fill-up to the next (I started out above "350 to empty" and can go well beyond "50 to empty"), I saved about 1.5 gallons of gas -- currently about $6. Even as a retail customer, I would have saved $3 after purchasing the Tab that provided these savings. (Not counting 2 Tabs used, which only happens in the first tank.) As a distributor (Agent), my savings would be $4 or more, depending on my level in the company.
Maximum results aren't reached until somewhere between 3 and 6 tanks of use. This is because the Tabs are busy cleaning up the engine so that it can work better in the long run. So one should NOT expect top results in the first tank, but after a few.
THIS IS WHERE THE TEST NOW STANDS. STEVE WILL UPDATE THE RESULTS AS EACH OF THE FIRST FEW TANKS IS COMPLETED.
SECONDARY TEST
I also ran a second test with mostly highway driving, very little city driving, and a fair bit of idling in my wife's 2006 Highlander. This car is supposed to get 17 city, 23 highway. I do not have BEFORE results to compare against, so the value of the tabs is based strictly on a comparison against Toyota's numbers.
In my first tank, driving under fairly optimal conditions (mostly highway driving at relatively low highway speeds, which optimizes gas usage), and using two tabs (for the first tank only), I achieved 23.3 MPG, which is slightly better than expected by Toyota. Again, this did include a fair bit of idling in parking lots, which would affect the number slightly.
For the second tank, I used only one tab and drove at much faster highway speeds, which should reduce the overall MPG (since you're running the engine at higher RPMs). Again, there was a decent amount of parking lot idling, though not enough to drastically effect the results. This time I achieved only 22.3 MPG.
Estimates were NOT based on computer readings, but on exact mileage driven divided by the number of gallons needed to fill the tank each time. (The first tank I got 361 miles on 15.5 gallons. The second tank I got 350 miles on 15.7 gallons.)