What oil does Acura RSX use?
The Acura RSX generally uses 5W-20 synthetic or synthetic-blend engine oil for its 2.0L K-series engines, with 5W-30 as an acceptable alternative in very hot climates or if 5W-20 isn’t available; always check your exact year and engine in the owner’s manual.
RSX engine variants and oil implications
The RSX came with two 2.0-liter K-series engines: the base RSX uses the K20Z3, while the high-performance RSX Type-S uses the K20A2. While lubrication goals are similar, the exact oil grade, capacity, and maintenance intervals can vary by model year. Start with the factory recommendation and adjust for climate and driving style.
K20A2 (Type-S) vs K20Z3 (base)
For both engines, Honda’s typical baseline is 5W-20 synthetic or synthetic blend in the later years of the RSX. In extremely hot climates or if 5W-20 is not readily available, many technicians substitute 5W-30. Always prioritize what your manual specifies for your exact year and engine.
Recommended oil viscosity by model year (typical guidance)
Use the following as a general guide, but always verify the exact requirement in your owner’s manual for your year and engine variant.
- 5W-20: Standard viscosity for most RSX models (both K20A2 and K20Z3), synthetic or synthetic blend.
- 5W-30: Acceptable alternative in hot climates or if 5W-20 is unavailable; may be recommended under certain service conditions.
Conclusion: Follow the official manual or dealer guidance for the correct viscosity and oil type for your specific RSX. Using the recommended oil supports engine longevity and performance.
Oil capacity and maintenance intervals
Oil capacity for most RSX variants is about 4.5 quarts (roughly 4.3–4.8 L) with a filter. Always confirm the exact figure for your engine in the manual. Drain intervals vary by oil type and driving conditions; conventional oil typically requires more frequent changes than synthetic oil, with synthetic often guiding longer intervals per the maintenance minder and driving style.
Summary
In short, the RSX’s baseline oil is 5W-20 synthetic or synthetic blend for most years and engines, with 5W-30 as a common alternative in hot climates or when 5W-20 isn’t available. Confirm the exact specification for your year and engine (K20A2 or K20Z3) in the owner’s manual or from Acura/Honda service literature, and use a high-quality oil that meets API and ILSAC standards. Follow the recommended change intervals based on oil type and driving conditions for optimal engine health.
