The 2018 Acura ILX with the 2.4L 4-cylinder engine (Engine Code K24V78) is a sophisticated compact sedan that demands precise lubrication to maintain its smooth driving dynamics and fuel efficiency. Using the correct viscosity and high-quality synthetic fluids is critical for this engine, which is designed for responsiveness and longevity. Acura recommends a specific 0W-20 viscosity for optimal protection across varying temperatures, and deviating from these specifications can impact performance, fuel economy, and the longevity of critical internal components like the timing chain and variable valve timing system. Proper maintenance using premium synthetic lubricants ensures that the engine remains clean, resists sludge buildup, and handles thermal stress effectively, whether during daily commutes or spirited driving on the open road.
Recommended AMSOIL Products
- AMSOIL Signature Series 0W-20 100% Synthetic Motor Oil – The top-tier choice offering up to 25,000 miles of protection, superior wear resistance, and exceptional engine cleanliness for your K24V78 engine.
- AMSOIL Extended-Life 0W-20 100% Synthetic Motor Oil – A cost-effective synthetic option providing 20,000 miles of protection with enhanced cleaning power to keep your engine running smoothly.
- AMSOIL OE 0W-20 100% Synthetic Motor Oil – Formulated to outperform conventional oils while meeting OEM mileage requirements, offering excellent defense against sludge and deposits.
- AMSOIL 0W-20 100% Synthetic High-Mileage Motor Oil – Specifically designed for engines over 75,000 miles to reduce sludge and boost detergent performance for older engines.
- AMSOIL Oil Filter – Provides 99% filtration efficiency at 20 microns to capture wear-causing contaminants and extend engine life.
- AMSOIL Passenger Car & Light Truck Antifreeze & Coolant – A phosphate- and silicate-free ethylene glycol pre-mix providing 150,000 miles of protection for the cooling system.
- AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – Engineered to withstand heavy towing, elevated temperatures, and provide smooth shifting for the 8-speed transmission.
- AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid – Ensures excellent ABS and traction-control responsiveness with stable viscosity across a wide temperature range.
When it comes to the engine itself, the 2018 Acura ILX’s 2.4L engine requires a specific oil capacity of 4.6 quarts when the filter is included. After refilling, it is crucial to check the oil level to ensure it is within the safe operating range. The oil drain plug torque specification is 30 ft/lbs. For those who prefer a slightly different filter option, the WIX Oil Filter is also a compatible choice. AMSOIL oils are not just about changing the fluid; they are about extending the service intervals safely. Signature Series can protect up to 25,000 miles or one year, whichever comes first, under normal service conditions, while Extended-Life covers up to 20,000 miles. The OE Synthetic is a great alternative for owners who want OEM-level performance without the higher price tag, and the High-Mileage version is ideal if the vehicle has accumulated significant miles, as it helps reduce oil consumption and restores engine performance.
Transmission health is equally vital for the longevity of the Acura ILX. The vehicle utilizes an 8-speed automatic transmission with specific fill requirements. The total fill capacity is approximately 7.7 quarts when the torque converter is drained and refilled, while a total fill of 7.5 quarts is noted when checking the rib mark. For a maintenance fill or fluid exchange, the initial fill capacity is around 4.1 to 4.3 quarts. Using a standard fluid often leads to rough shifting and reduced fuel economy over time. AMSOIL’s Signature Series Fuel-Efficient Automatic Transmission Fluid is specifically designed to handle the rigors of the ILX’s transmission. It remains fluid even in sub-zero temperatures and resists the oxidation that leads to sludge, ensuring the torque converter and valve body operate smoothly. This fluid is particularly beneficial for owners who push their vehicles harder, as it offers reserve protection during heavy use and towing.
Beyond the engine and transmission, the cooling system requires attention to prevent overheating, which can be detrimental to the aluminum components of the K24V78 engine. The cooling system capacity for the 2018 Acura ILX is 6.9 quarts. AMSOIL offers two excellent choices for this system. The AMSOIL Passenger Car & Light Truck Antifreeze & Coolant is a 50/50 pre-mixed ethylene glycol solution that requires no mixing. It provides protection against corrosion, scaling, and freezing up to 150,000 miles. Alternatively, the AMSOIL Propylene Glycol Antifreeze and Engine Coolant is a concentrated option that offers exceptional performance and longevity, especially in extreme environments. It is compatible with all cooling system metals, gaskets, and hoses, and is free of the phosphates, silicates, and borates that can sometimes damage newer engine materials. Maintaining the cooling system is a simple yet effective way to ensure the engine runs at its optimal operating temperature.
Safety systems on the Acura ILX also benefit from synthetic lubricants. The vehicle’s braking system operates under significant thermal loads, and standard DOT 3 fluids can boil under hard braking conditions. AMSOIL’s DOT 3 and DOT 4 100% Synthetic Brake Fluid raises the boiling point significantly, ensuring consistent pedal feel and reliable stopping power. This is particularly important for a front-wheel-drive sedan that may be driven aggressively. Additionally, for those looking to maintain the vehicle’s appearance or protect it from the elements, AMSOIL offers a range of detailing products. From the Heavy-Duty Degreaser to remove grime from the engine bay to Silicone Spray that protect rubber seals, there are tools available to keep the vehicle in top condition.
About the Vehicle
The 2018 Acura ILX represents the second generation of this compact luxury sedan, building on a platform that shares significant DNA with the Honda Civic but is elevated with Acura’s hallmark quality, refined interior, and premium sound system. Introduced as a budget-friendly entry into the luxury segment, the ILX has consistently been a favorite among drivers who appreciate precision handling without the steep price of larger luxury sedans. The model sits at the entry-level of the Acura lineup, offering a sophisticated driving experience that feels more substantial than its mainstream competitors.
Powered by the K24V78 engine, the 2018 ILX features a 2.4-liter inline-4 cylinder that produces 201 horsepower and 180 lb-ft of torque. This naturally aspirated powerplant is known for its smooth power delivery, linear throttle response, and reliability. The engine is paired with an 8-speed dual-clutch transmission, which was a significant update for the model, offering swift and smooth shifts that enhance both fuel economy and performance. The combination of the VTEC engine and the dual-clutch gearbox makes the ILX one of the most engaging cars in its class, often delighting driving enthusiasts who look for a connection between the road and the driver. The chassis is tuned for a balance of comfort and sportiness, utilizing a MacPherson strut front suspension and a multi-link rear suspension to absorb road imperfections while maintaining cornering stability.
Owners of the 2018 Acura ILX typically value the vehicle for its low maintenance costs relative to its luxury status, excellent build quality, and fuel-efficient driving dynamics. The interior is known for its high-quality materials, comfortable seating, and the available Technology Package which adds features like a premium AcuraWatch safety suite, a backup camera, and a high-output audio system. However, like any vehicle, the ILX can develop common issues as it ages, and using the right synthetic lubricants can mitigate or prevent many of these problems.
One common concern for owners is the accumulation of carbon deposits on the intake valves, particularly since the engine utilizes direct injection in some contexts or high-stress fuel burning. Over time, this can lead to rough idling and a loss of power. Regular use of fuel additives like the AMSOIL P.i.® Performance Improver and maintaining clean oil helps keep the fuel system and combustion chambers clear. Another potential issue is the degradation of rubber seals and gaskets in older high-mileage vehicles, which can lead to oil leaks. The AMSOIL High-Mileage motor oil contains seal conditioners that help swell and rejuvenate these rubber parts, reducing the likelihood of drips and leaks.
Furthermore, the 8-speed dual-clutch transmission can sometimes exhibit shudder or hesitation if the fluid breaks down under heat stress. This can happen if the vehicle is frequently driven in stop-and-go traffic or if the owner engages in spirited driving. Using a high-performance synthetic transmission fluid like the AMSOIL Signature Series ATF can prevent this fluid breakdown, ensuring that the clutches engage smoothly and the transmission shifts seamlessly. Finally, some owners report issues with cooling system efficiency in high-temperature climates. The 2018 ILX is prone to running slightly hotter than average during extended highway driving or in congested city traffic. A high-quality antifreeze with superior heat transfer properties and corrosion protection can help manage these temperatures, preventing overheating and protecting the aluminum components of the engine block and radiator.
By addressing these specific maintenance needs with premium synthetic lubricants, owners can significantly extend the life of their 2018 Acura ILX. The K24V78 engine is a robust unit, but it thrives on clean oil and precise fluid dynamics. Whether you are extending your oil change intervals or simply switching from conventional to synthetic, the investment in high-quality lubricants pays dividends in performance, reliability, and resale value. The 2018 Acura ILX remains a compelling choice for those who want a refined driving experience, and keeping it well-lubricated ensures it continues to deliver the premium feel that Acura owners expect.