How many quarts of oil does a 2018 Acura RDX take?

The 2018 Acura RDX with the 3.5 L engine requires 4.5 quarts with a new filter, or 4.2 quarts without filter replacement.

What oil viscosity does a 2018 Acura RDX use?

The recommended oil viscosity is 0W-20.

verifiedOEM-verifiedOEM-verified · Updated 2026

3.5 L engine

With filter4.5 qtViscosity0W-20

Oil Capacity — With Filter

4.5

quarts

4.3 liters

Viscosity

oil_barrel0W-20

With oil filter4.5 qt (4.3 L)

Without oil filter4.2 qt

Recommended viscosity0W-20

OEM oil filterVerify by VIN or OEM parts catalog

Change intervalSee owner manual

Drain plug torqueSee owner manual

verifiedSource: 2018 Acura RDX Owner's Guide (BTX41818OG), Recommended Engine Oil section; Specifications pages 148-149 · Human-verified

Drain old oil completely. Reinstall the drain plug and tighten to the torque listed in the owner manual.

Install a new oil filter and pre-lubricate the gasket with clean oil. If the part number is not listed in your manual, confirm it by VIN.

Add 4.5 quarts of 0W-20 engine oil through the filler cap.

Run engine 30 seconds, check dipstick, top off to FULL mark if needed. Reset oil life monitor if equipped.

warningImportant Notes

• Always verify with your OEM owner's manual. Specifications may vary by trim level and production date.
• The drain plug gasket should be inspected and replaced if deformed.

Always verify against your OEM owner's manual. Specs may vary by trim and production date.