MPG-CAP? is fully EPA registered
Sorta like one company touting the therapeutic effectiveness of its infrared-based (IR) therapy light, which it advertises as "FDA approved" in close proximity to its therapeutic claims.
Except that the FDA never "approved" it for the treatment of any malady, condition, or symptom. The FDA did test another company's medical grade IR light device for general SAFETY, but not for effectiveness. IOW, the FDA concluded it would not kill or injure you, not that it was effective for anything. Big difference.
The FTC cracked-down on all these engine, fuel, and transmission treatment/additive companies several years ago, told them to prove their claims with science or stop making them. All of them modified the content of their advertisements to avoid making the specific claims that the FTC ordered them to prove, paid some fines and entered into consent decrees to settle FTC charges of past misconduct.
The FTC doesn't have the resources to keep on top of them all, but focuses on particular industries or markets from one year to the next. Even then it can only take-on the 'big' offenders with the highest sales, market share, advertising presence, or popularity. It will take a few years for the FTC to get back around to the engine, fuel, and transmission treatment/additive market.