Mazda RX-8, SE (EU)

Additional Notes

• The Mazda RX-8 SE (EU) cooling system capacity spans a range of 9.8 to 10 liters depending on the engine variant, with the 141 kW configuration listing a range of 9.8–10 liters, the 158 kW configuration fixed at 9.8 liters, and the HP trim fixed at 10 liters.
• The 141 kW variant's capacity range of 9.8–10 liters reflects a service fill tolerance rather than a single precise volume, which is common in cooling systems where air pockets or bleed procedures can affect the final fill level.
• All three variants share an identical coolant check interval of 40,000 km or 24 months, whichever comes first, applying uniformly across both the normal and alternative use conditions.
• Under normal use conditions, all three variants specify a coolant change interval of 200,000 km or 132 months. At 132 months, the time-based interval equals 11 years, making the mileage threshold the more likely limiting factor under regular driving patterns.
• The alternative (acceptable) use condition replaces the distance-and-time change interval with a strictly time-based interval of 24 months, regardless of mileage accumulated. A 24-month change cycle is considerably more frequent than the 132-month ceiling under normal use.
• The 158 kW engine variant, covering the 2006-2011 model years, carries a fixed capacity of 9.8 liters with no upper tolerance listed, in contrast to the 141 kW variant of the same years, which lists the broader 9.8–10 liter range.
• The HP trim, spanning 2003-2011, specifies a fixed 10-liter capacity, which represents the highest single capacity value across all three variants in the specifications.
• The pairing of a 40,000 km or 24-month check interval with a 200,000 km or 132-month change interval under normal use means the cooling system would be inspected multiple times between each full fluid change, consistent with a long-life coolant formulation.