It's basically an MLM company that skirts around scam and pyramid schemes. The Web site reads like an infomercial, and with good reason, to deflect your attention away from the product. The "sounds too good to be true so it probably is magic pill" is nearly 100% naphthalene (primary ingredient in moth balls)
BPI used to be BioPerformance out of Texas, until they were shut down and put out of business for claiming a 25% increase in fuel mileage. Now they're back as BPI, out of Salt Lake, only with the court-ordered disclaimer about the product containing naphthalene and it's health effects, as well as the very fine print bottle disclaimer that they guarantee no results whatsoever, much less an increase in fuel mileage. On the Web site they tout the results of lab tests, results anyone can get by tossing naphthalene into their tank.
What they don't tell you is that naphthalene, with it's high melting point of 80C, will precipitate out as fuel evaporates, and will clog injectors and filters. Naphthalene was a routine gasoline ingredient to increase octane before WWII, back when most gas had an octane rating were in the 40-60 range, and increased in the 50's to 60-80, as it has a blended octane of 90. But as lead went into the gas, naphthalene came out. As lead came out, better refining techniques rendered naphthalene worthless as an octane booster.
Naphthalene has a cetane rating of exactly zero, so its use in diesel fuel as an additive would be, uhm, somewhat limited insofar as increasing fuel economy. The cetane number of diesel fuel is a percentage of cetane to alpha methyl-naphthalene, and is obtained to a consistent number by diluting cetane (100 rating, high ignition quality) with alpha methyl-naphthalene (0 rating, very poor ignition quality). So, the more naphthalene magic pills you drop into the tank, the lower your cetane number goes, which is the opposite of getting more miles per gallon out of your fuel.
