If you do insist on using CDr's in your vehicles, and many people do due to reasons of theft and damage to discs etc. (as well as home audio equipment) my experience of pressing some several thousand discs has found a combination that works most reliably. As TB remarked, the key is good media. Verbatim discs are good but I tend to favour 'Imation' discs. These have proved most reliable for myself but also burned in tandem with a good writer.
CD writers are so cheap, the ones I prefer are made by Pioneer and have achieved perfect results everytime through Nero, some of which are a good number of years old. We have managed to achieve around 99% success when using this disc/write method.
The other important issues with CDr's is CD labels. The heat generated in a head-unit can cause the labels to peel off and land you in sticky (no pun intended!) territory. My advice would be not to use cheap labels and not to use thick labels, they can also cause balance issues with the disc, better not to use labels at all.