seahawk98,
I have been burning cd's for about 5-6 years. I have several hundred of them. I have mostly used Verbatum cdr's but have also used Memorex and Samsung. I have rarely, if ever, had any problems with any of them. I am currently using Easy CD Creator version 4.0 but have used older versions of Easy CD Creator. My first burner, years ago, came with NTI CD-Maker. All have worked equally well. Since I have been burning cd's for a long time, I started to burn back then at speeds of 2X or 4X. I rarely burn at speeds higher than that today. If I have plenty of time I still burn at 2X. I would suggest you try to burn one cdr at 2X and see if it plays in your car.
Good luck.
Mike