CarEssential Oil Car Air Freshener By Paul Ahlstrom · Last updated October 31, 2026 Between traffic and endless red lights, most of us spend more time in the car than we'd like to admit. Driving can also be a stressful part of the day, and over time even a clean car can start to smell stale. Aromatherapy helps with both. This easy DIY wool felt ball diffuser freshens your car and lets you choose the mood of every drive. Why Wool Felt? Wool felt balls soak up essential oils and release the aroma slowly, with no electricity, heat, or water. They're reusable, so you can change scents whenever you like. Ingredients 7–8 wool felt balls Thread and a large sewing needle Ribbon or twine Essential oils of choice Instructions Thread a large sewing needle with enough thread for seven to eight felt balls. Pierce through the center of each ball until you have enough to make a complete circle. Knot the thread between the connecting balls to form a circle. Cut a piece of ribbon or twine long enough to fit over your rearview mirror. Thread it through the circle and tie it off at the top. Trim any excess. Hang your new DIY car diffuser in your car. Add a drop of essential oil to each ball whenever you want to uplift, energize, or calm the mood. Get creative and use a few different oils at once. Tip: If you'd rather not hang it from your mirror, keep it in a cup holder or hang it from a hook in the back seat where passengers can enjoy it too. Blends for the Road Morning commute: Peppermint and Wild Orange Calm in traffic: Lavender and Cedarwood Fresh and clean: Lemon and Siberian Fir Road trip cheer: Citrus Bliss A Few Tips Don't let oiled felt rest against dashboards or plastic trim, since oils can mark some surfaces. Keep the scent light so it's pleasant, not distracting, while you drive. Refresh with a new drop every few days. Love diffusing at home too? Read our tips for diffusing essential oils. FAQ How long does the scent last? Usually a few days, depending on the oil and the temperature in your car. Just add another drop when it fades. Can I mix different oils on the felt balls? Yes. Put a different oil on each ball, or blend a few for a custom scent. Will the oil damage my car? Keep the felt from touching the dashboard, upholstery, or plastic, since undiluted oils can mark some surfaces. Where can I find wool felt balls? Most craft stores and online craft shops carry them in many colors. More on DIY Home DIY HomeMake your home a doTERRA AbodeAugust 11, 2022 DIY HomeBEST ESSENTIAL OILS FOR LAUNDRYAugust 11, 2022 DIY HomeCan Essential Oils Be Used to Repel MosquitosApril 20, 2022