Quoting your source......Perhaps it was an ambiguous choice of words..but the point is that virtually All fuel additives issue warnings on their labels Cautioning against “overdosing”.
In fact, the fuel-additive industry advises against it….(but perhaps you’re correct…if it’s snake-oil…you can’t believe anything they put on their labels anyway…YOU know so much more than the manufacturers do about their own products…heh?)
It’s important to closely monitor how your fuel reacts to certain additives. And one of the keys to the success of FPPF premium fuel treatments is treating regularly and knowing how much treatment to add. Which is why every FPPF product has its own ratio specifications.
With that said, it’s difficult to over-treat with FPPF products. Our experienced team of product researchers and developers formulate each product under the assumption that it will be used generously.
Over-Treating Doesn’t Exist with FPPF
Generally, the flash point and viscosities of FPPF products are extremely similar to diesel fuel and heating oil. The combustibility of FPPF products is also formulated to be very similar to that of diesel fuel. Even if three times or more the recommended treatment quantities were added to your diesel fuel, you would not experience any ill effects. Note, however, triple dosage should only be used if extreme conditions arise and a persistent fuel issue is prevalent.