Videomaker – Learn video production and editing, camera reviews › Forums › Technique › Sound › Recording sound in a moving car? › All the above advice is go
All the above advice is good so I won’t add to that. However, my first bit of advice is CRUISE CONTROL.
The road noise will have a variable frequency based on your speed. A long time ago I shot a scene for a movie in a jeep that was rolling down the highway with an actor driving. Post production was a nightmare because the speed and therefor the frequency of the noise changed on each take.
So set your cruise control for the lowest speed you’re comfortable with and let the other drivers pass you by. No matter what you use to shoot or filter later, you will be glad all the noise is the same.
My second bit if advice is that all cars are not created equal. If you can borrow or have the budget to rent a car, especially a newer luxury type vehicle, you may find the noise to be much less noticeable.