How to Properly Mix and Add Windshield Washer Fluid

Maintaining clear visibility while driving is crucial, and your windshield washer system plays a significant role in this, especially if you're dealing with tough road conditions like sand. Mixing and adding your windshield washer fluid correctly is essential for effective cleaning and preventing sensor issues. Here’s a step-by-step guide:

Materials Needed:

• BMW fluid concentrate (or any brand suitable for your vehicle)
• Distilled water
• Clean mixing container
• Funnel (optional)

Steps:

1. Calculate the Required Amounts:

   • Check your vehicle’s manual for the capacity of the windshield washer fluid reservoir.
   • Decide on the concentration of the mixture based on the weather conditions you expect to encounter. For freeze protection, a typical mixture is 1 part concentrate to 3 parts distilled water.

2. Pre-mix the Fluid and Water:

   • In a clean container, combine the BMW fluid concentrate with distilled water.
   • If aiming for freeze protection to -25°F, a common mixture would include 16 ounces of concentrate to 48 ounces of distilled water, adjusting based on your specific needs.

3. Stir the Solution Thoroughly:

   • Mix the solution well to ensure the concentrate is completely blended with the water. This step is crucial to prevent any concentrate from settling at the bottom, which can lead to sensor fouling and uneven cleaning effectiveness.

4. Pour the Mixture into the Reservoir:

   • Use a funnel to transfer the mixture from your container to the vehicle’s windshield washer fluid reservoir. This helps prevent spills and ensures all the fluid gets into the reservoir.

5. Test the Washer System:

   • After filling, start your vehicle and activate the windshield washer system to ensure it sprays properly.
   • Check for any warnings on your dashboard and confirm that the fluid effectively cleans the windshield.

6. Observe and Adjust If Necessary:

   • If you notice streaking or poor cleaning performance, adjust the concentration of your mixture. More concentrate may be necessary if the fluid seems too diluted.
   • Regularly check the fluid level and mixture quality, especially before long trips or during extreme weather conditions.

Additional Tips:

• Avoid using water that contains minerals, as they can deposit on your windshield and wiper blades, reducing visibility and potentially damaging your wiper system.
• If your vehicle has sensitive sensors, such as capacitive washer fluid level sensors, ensure the cleaning products used are compatible to avoid damage.

By following these guidelines, you can maintain optimal performance of your windshield washer system and ensure safe driving conditions, regardless of the weather or road dirt you might encounter.