I've tried making audio discs on my computer to play in the car, but I haven't met a car stereo yet that would play them reliably. (But then all my cars and their stereos are crap, so that's not a very useful data point.) Commercially pressed audio CDs are made with a different and more robust method of "marking" the discs than the wimpy little laser in a CD writer, and many audio disc readers expect that.
I'd suggest burning a data CD with some MP3 files and see if that will play in your stereo. If it does, great. If it doesn't, you haven't spent much to find out the answer. (And if it does work, you can go for what's behind Door #2 and try burning a DVD with MP3 files and see if that works too.)