Overall, Mazda's RX8 is a fairly reliable car. However, to attain that reliability and dependability, you'll first have to learn how to maintain it. While the RX8 won't cause you too many issues in its lifespan, it can present problems if you don't service it well. Of which, the RX8 requires plenty of maintenance owing to its rotary-style RX8 engine. Its RENESIS 1.3-liter rotary engine constantly destroyed ignition coils, so you'll have to replace these often. In addition, you'll also have to change its motor oil pretty frequently, as regular as every 3,000 miles. There are also other issues, such as how a rotary RX8 engine would flood the engine with fuel. Or, how quickly and easily it heats up, which consequently means that their catalytic converters don't usually last very long.