The rotary engine behind the RX-8 — genuinely unique, high-revving engineering unlike anything else on the used market, paired with well-documented apex seal wear that fundamentally shapes how any purchase decision should be made.
The rotary engine's fundamental design — apex seals sliding against the rotor housing at high speed — makes seal wear an inherent characteristic rather than an occasional defect, and oil consumption by design (this engine burns a small amount of oil as part of normal operation) is simply part of rotary ownership rather than a symptom to fix. Buyers need to approach this car with realistic expectations shaped by rotary-specific knowledge, not conventional piston-engine assumptions.
Not a guarantee, but a pattern seen consistently across owner forums and independent-garage reporting.
The range where compression typically begins showing meaningful decline on engines without rotary-specific maintenance attention.
Many owners budget for a rebuild or replacement engine as a known, expected part of long-term rotary ownership rather than an unlikely exception.
A compression test is absolutely essential before buying — this single test predicts remaining engine life more directly than almost any check on any other vehicle in this catalogue.
Ask whether the owner understood and followed rotary-specific starting and idling procedures, since incorrect operation can accelerate flooding and seal wear.
Approach this purchase through a rotary specialist rather than a generalist mechanic, given how different this engine's maintenance needs are from any conventional piston engine.
Model-specific pages, with notes on how it behaves in that particular car.