True strength comes from within, particularly when it comes to classic Porsche vehicles. It is even more important to keep an eye on what is on the inside of these cars. When classic cars are not used on a regular basis, or especially when they are stored during winter, the fuel is an important topic to consider. Fuel additive from Porsche Classic helps – with the “Made in Germany” quality you expect.

True strength comes from within: Porsche Classic Fuel Additive

The additive has two main effects:

The protective effect

The fuel additive forms a protective layer between metal and fuel. This is a gentle process that protects the tank and fuel system against corrosion and deposits – even the areas that are not covered by the fuel, such as the air zone in the fuel tank. Special molecules in the additive form a corrosion protection layer throughout the fuel system, thus ensuring an optimal level of protection. Condensation that has already formed in the fuel system is bonded by the chemical elements and does not cause any damage.

The figure shows part of a fuel cap with and without using the Porsche Classic Fuel Additive. As part of the long-term tests, the part was subjected to an accelerated aging process. The aging is visible when you move the arrow in the graphic to the right.

Possible impact of not using the additive:

If your classic car is left stationary for extended periods of up to seven months, condensation can form in the fuel system. This condensation can cause various components within the fuel system to corrode. The components of the fuel with a low boiling point can evaporate, resulting in a sticky residue on the carburetor and injectors, as well as on the electric pump. After the vehicle is left stationary for long periods, the engine may no longer start, may jolt or may not fire on all cylinders.

What amount of additive is recommended?

The 300 milliliters of Porsche Classic Fuel Additive supplied in the container is sufficient for fuel tanks ranging from smaller ones such as the 50-liter tank in the Porsche 356 up to larger tanks with a capacity of 90 liters, such as in the Carrera GT. The fuel additive remains effective for stationary periods of up to seven months and its performance only begins to gradually decline after this period of time.

The Porsche Classic Fuel Additive can be used in all classic Porsche cars. What’s on the inside counts when it comes to optimum car care – and as you would expect, we leave nothing to chance in this respect.

The Porsche Classic Fuel Additive (part no. 00004420622) is available from your Porsche Classic Partner and at your Authorized Porsche Dealer.