- 4min
What are additives?
Additives, also known as auxiliary materials, are substances that are added to a product in small quantities to achieve or improve certain properties or to reduce or prevent undesirable properties. They can be used both preventively and to solve specific problems.
Using additives
You don't have to visit a workshop to use our additives. Most of our additives can easily be added to the oil in the engine, transmission or steering system before filling up your vehicle's fuel or coolant. The instructions for how to do this can be found on the back of the respective product.
Explanation of the color coding of LIQUI MOLY additives
You can easily tell whether our additives are fuel, oil or coolant additives by the color of the cap. A black cap means that the additive is intended for the engine oil system. Additives with a blue cap are for gasoline fuel systems, and with a red cap for diesel. A white cap indicates that the additive should be used in the coolant system.
| Cap color | Usage |
| black | Engine oil |
| blue | Fuel, gasoline |
| red | Fuel, diesel |
| white | Coolant |
Mixing additives
We do not generally recommend mixing different additives! However, some combinations are possible.
Especially when adding engine oil additives, we recommend that these do not exceed 10 percent of the total amount of oil in the engine. Do not add more than two different engine oil additives. Please refer to our matrix to find out which additives can be combined with each other. Some additives cannot be mixed.
If you have any further questions about using additives, our application engineers will be happy to help you at any time.
You can also find useful information and answers to many questions about additives in our FAQ section.
