Preventing phase separation in ethanol blended gasoline

When we say “Prevents Phase Separation” we mean that the use of K100G or MG will keep phase separation from happening at the .5‰ water concentration that will typically cause room temperature phase separation in E-10 that is untreated. As some critics have correctly pointed out, what we are really doing is delaying phase separation. If the water concentrations continue to build significantly beyond that .5‰ point, even fuel treated with the recommended amount of K100 will phase separate. That separation point can be raised by increasing the concentration of K100, but we’ve found that for the most part, our recommended 1:300 mixing ratio seems to work for the most commonly encountered situations. If you are in a very high moisture exposure situation, increasing the mix ratio to 1:200 or 1:150 is perfectly acceptable (Remember, “Too much will not hurt – Too little will not help”), and is a prudent way to manage this problem. Our goal is to provide you with a means of keeping your fuel safe and stable so you can keep your engine running properly under any circumstances you might encounter, at a cost that is reasonable.

Reversing phase separation does not require a complex chemical reaction, simply a means of separating the water/ethanol mix such that the ethanol can go back into solution with the gasoline, and the water be rendered unavailable for further chemical mischief. Remember that phase separation is caused by the ethanol combining with water into a solution that is heavier than gasoline; once that happens, the ethanol/water solution sinks to the bottom of the tank and voila, we have phase separation. To undo this mess, we have given K100 a much stronger chemical affinity for water than ethanol has. Adding K100 to the phase separated fraction of the fuel will liberate the ethanol from the water, allowing it to go back into solution with the gasoline. Meanwhile the K100 chemically reacts with the water, rendering it harmless, at the same time creating a burnable compound with the appropriate specific gravity such that it mixes back into the E-10 in a permanent solution.

The key to reversing phase separation is using enough K100 to do the job. We’ve found that it takes an amount of K100 equal to the phase separated fraction of the fuel you are treating in order to induce spontaneous phase separation reversal. So the question becomes, how do you know how much the phase separated fraction is? If you can figure out what the total fuel volume is, take 10‰ of that to get the ethanol content, and figure another 1‰ to account for the water content (We recommend 1‰ even though .5‰ will induce phase separation, just to be safe.) and add that amount of K100 to the tank. You’ll know you’ve got it right when the fuel looks clear. If it is still cloudy, add a bit more K100. When you do the math, you’ll quickly realize that that’s a pretty expensive way to fix your fuel problem. Prevention is a much better way to go, and it’s a lot less frustrating. By way of an example, let’s suppose you had 100 ounces of phase separated fuel. Using our calculation, it would take 11 ounces of K100 to reverse that, and make it usable again. On the other hand, if you had treated that fuel with half an ounce of K100, it never would have phase separated in the first place. Seems pretty simple, don’t you think?