Diferent speed burning problems

my car cd player have dificulites reading cd’s which are burned on 40x. when i burn at 52x or 32x cd player read without problems. why? i just want to know if anyone else had that problem.

Perhaps it is the discs you are using. When burning at a specific speed, the recording will use a specific strategy to get the information onto the disc at the desired speed. It may be using a different method when burning at the faster or slower speeds compared to 40x.