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The 2018 Acura MDX comes with a 3.5 L V6 engine that requires 0W-20 Synthetic Motor Oil for optimal performance in all weather conditions. The vehicle has a capacity of 5.7 quarts with a filter or 5.4 quarts without a filter, and the torque specification for the drain plug is 29 ft/lbs. The 0W-20 specification indicates that the oil is thin enough for easy startup (0 viscosity), suitable for winter conditions (the "w" in 0W), and maintains proper viscosity at operating speeds (20 viscosity). Using oil is essential for keeping the engine clean and potentially prolonging its lifespan. It is recommended to change the oil and filter every 3,000 to 5,000 miles to ensure optimal engine performance since oil does not last forever. The cost of an oil change typically ranges from $50 to $60 for labor, with additional charges for parts if needed.
I consulted the guidebook and it turns out that you can stick with the regular oil instead of synthetic.
A 2018 Acura MDX suggests using SAE 0W-20 synthetic oil. The amount needed depends on the engine size. For the 3.0L V6, you'll need 4.5 quarts, while the 3.5L V6 requires up to 5.7 quarts, along with a new filter.