I decided to install sound deadening which should also provide for a more comfortable ride. I went with the Kilmat 1.3mm product which I purchased from Amazon.
I first cleaned the area as best as I could and then started testing the best way to use the sheets. Once I knew how they would fit I peeled off the backing, placed them and then used the roller to finish it off. I had to cut a few odd shaped pieces but that was easy with scissors.
I’m really pleased with the finished product. One box was enough to do the entire floor including the wheel wells.