Are Volkswagen and Audi's Antifreeze Interchangeable?

[Gilbert]

Volkswagen and Audi's antifreeze cannot be used interchangeably. Antifreeze with different compositions or colors must never be mixed. Mixing antifreeze with different compositions will cause a chemical reaction in the antifreeze agents, rendering the antifreeze ineffective. Vehicle antifreeze generally needs to be replaced every 2 years or 40,000 kilometers. This is only a reference interval. For commercial vehicles with longer mileage, the replacement interval should be shorter. Since driving conditions vary for each vehicle, the replacement should be based on actual usage. Check the antifreeze's condition—if it is insufficient, replenish it promptly. If suspended particles, sediment, or signs of deterioration or discoloration are found in the antifreeze, replace it immediately and clean the system. How to determine if antifreeze is low: Observe the antifreeze warning light on the dashboard. If it illuminates, it is likely due to low antifreeze levels, though it could also be caused by excessively high cylinder temperatures. Check the antifreeze reservoir. If the fluid level is below the minimum mark (MIN), do not continue driving and add antifreeze promptly. Check the fluid level markings on the antifreeze tank. The antifreeze level should normally be between the maximum and minimum marks. If it is below the minimum mark, it indicates low antifreeze levels.