Everyone has already given you the answers to this.
Just to add my $0.02 of experience, I went through trial and error with various spindles of CD-R stock I had on hand until I found a batch that worked in my brother's car CD Player.
They were cheap generic discs. I gave him the spindle.
Most of the time a burn from that batch plays fine in his car.
Occaisionally, a disc will play but the songs will play out of order.