Can I Mix Fuel Additives?

We don't recommend mixing fuel treatments.

Most fuel treatments are petroleum-based and are specifically designed to repel water. K100 is bio-based and specifically designed to attract water. Mixing the two together with water as a catalyst may cause unknown and undesirable reactions.

To test for compatibility of additives with water, add equal amounts of water, K100 and the other treatment to a small glass bottle. If the resulting liquid is clear, the two treatments are compatible. If it's milky, or you see any formation of solids, the treatments are not compatible.

However - Even if compatible with water, other components in the different treatments may cause unpredictable reactions when added to fuel. It's best practice not to mix them. Always use up as much of the old treated fuel as possible before changing to a different treatment to avoid problems.