How much oil does a RSX take?
The Acura RSX typically requires about 4.5 quarts of engine oil with a filter installed (roughly 4.3 liters). If the filter is not replaced, the capacity is a little lower, around 4.0 quarts (about 3.8 liters).
The RSX line (2002–2006) used a 2.0-liter K-series engine in both the base and Type-S variants. While the exact capacity is similar across these engines, it’s important to confirm the specification for your specific model year and whether you’re including a new filter in the change. This guide outlines typical capacities and provides practical guidance for oil changes and oil-viscosity choices.
RSX Oil Capacity by Model
Before listing the typical values, note that capacities vary slightly by engine variant and whether the filter is replaced during the change. The following figures reflect common, field-reported values for the RSX lineup.
- RSX Base (K20A3, 2.0L): 4.5 quarts (4.3 L) with a new filter; approximately 4.0 quarts (3.8 L) if the filter is not replaced.
- RSX Type-S (K20A2, 2.0L): 4.5 quarts (4.3 L) with a new filter; approximately 4.0 quarts (3.8 L) if the filter is not replaced.
These figures correspond to a standard drain-and-fill oil change. Actual amounts may vary slightly based on the exact year, oil filter size, and whether any oil was previously lost during draining.
Notes by Year and Engine Variant
Across 2002–2006 RSX models, the oil-capacity numbers are largely consistent between Base and Type-S versions. If you’re tracking exact capacity for a specific vehicle, consult the owner’s manual or the service bulletin for your exact year and engine code to confirm any minor deviations.
Oil Type and Viscosity Recommendations
Choosing the right oil is as important as choosing the right quantity. The RSX’ K-series engines typically follow Honda/Acura guidance, with the following expectations.
- Viscosity: 5W-30 is commonly recommended for RSX engines in most climates; 5W-20 or 0W-20 may be specified for very cold climates or as allowed by your manual. Always follow the viscosity specified for your region and climate in the owner’s manual.
- Specifications: Use API SN or newer and ILSAC GF-5 or better. Synthetic or synthetic-blend oils are commonly recommended for K-series engines, especially for higher-performance variants like the Type-S.
- Quantity note: The 4.5-quart figure is with a new filter; if you’re not replacing the filter, plan around 4.0 quarts and top off as needed after the initial fill.
In practice, choose an oil that meets or exceeds the manufacturer’s specs and use the correct viscosity for your climate. Always verify with your manual and the oil label before purchasing.
Maintenance Tips: How to Do a Proper RSX Oil Change
- Warm up the engine for a few minutes to ensure the oil drains smoothly.
- Turn off the engine, lift the car, and place a drain pan underneath the sump plug.
- Remove the drain plug and allow the oil to drain completely; replace the drain plug gasket if needed.
- Remove the old oil filter, wipe the mounting surface, and install a new filter with a light coat of oil on the gasket.
- Fill the engine with the recommended amount and viscosity of oil (about 4.5 quarts with a new filter).
- Check the oil level with the dipstick, add small amounts of oil as needed, and recheck until the level sits between the marks.
After completing these steps, start the engine and let it run for a minute, then recheck the oil level once the oil has circulated. Top off if necessary. Proper disposal of the old oil is essential—use a certified recycling facility.
Summary
The RSX typically takes about 4.5 quarts of engine oil with a filter, or about 4.0 quarts if the filter isn’t replaced. Both the base K20A3 and the Type-S K20A2 variants share similar capacity figures. Use the recommended viscosity (commonly 5W-30) and a current API SN or newer oil specification, preferably synthetic or synthetic-blend. Always verify exact requirements in your owner’s manual for your year and engine code, and ensure proper oil-change procedures and disposal practices are followed.
