Proper lubrication is the backbone of reliable performance for your 2018 Mazda MAZDA6. This vehicle is powered by a 2.5-liter four-cylinder engine that demands specific fluid formulations to maintain optimal efficiency and longevity. Using the wrong viscosity or non-synthetic fluids can lead to premature wear, reduced fuel economy, and costly repairs down the road. The right maintenance regimen ensures that the internal components operate smoothly, even under demanding driving conditions or extreme temperatures.
Recommended AMSOIL Products
- AMSOIL Signature Series 0W-20 100% Synthetic Motor Oil – Offers unsurpassed engine protection for up to 25,000 miles and shields against horsepower loss.
- AMSOIL Extended-Life 0W-20 100% Synthetic Motor Oil – Provides extended-service protection up to 20,000 miles with superior cleaning power.
- AMSOIL OE 0W-20 100% Synthetic Motor Oil – An excellent choice for OEM-mileage performance that fights sludge and deposits.
- AMSOIL 0W-20 100% Synthetic High-Mileage Motor Oil – Specifically formulated for engines with over 75,000 miles to reduce sludge and consumption.
- AMSOIL Oil Filter – Delivers 99% filtration efficiency to keep contaminants from damaging engine parts.
- AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – Withstands high heat and heavy loads to protect your transmission.
- AMSOIL OE Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – A cost-effective option that protects against wear.
- AMSOIL Passenger Car & Light Truck Antifreeze & Coolant – Extends coolant life up to 150,000 miles or 5 years.
- AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid – Provides stable viscosity and excellent responsiveness for ABS systems.
Understanding the specific requirements of your Mazda MAZDA6’s 2.5-liter engine is critical. The engine oil capacity for this model, including the filter, is 4.8 quarts. After refilling, always check the oil level to ensure it is within the proper operating range. The drain plug torque specifications should be between 23 and 30 foot-pounds. By adhering to these capacities and utilizing high-quality synthetic oils, you can extend the service intervals significantly compared to conventional oils. The Signature Series fluid, for instance, is engineered to protect against horsepower loss and wear far better than industry standards, while the Extended-Life variant offers a balance of protection and value for those who drive varying distances.
Transmission and Cooling Systems
The automatic transmission in this vehicle requires specific fluid to handle the rigors of daily driving. For the 6-speed automatic transmission, initial fill capacities vary slightly based on the engine code, ranging from 3.5 quarts to 4.9 quarts. A complete fluid change requires approximately 8.2 to 8.5 quarts depending on the specific configuration. Using a synthetic automatic transmission fluid like the AMSOIL Signature Series Fuel-Efficient Fluid ensures the transmission remains fluid in sub-zero temperatures and resists breakdown under heavy towing or elevated heat conditions. This fluid also offers reserve protection during abusive use, ensuring the transmission shifts smoothly.
Cooling system integrity is equally important for the longevity of the engine. The 2018 MAZDA6 2.5L engine requires 7.4 quarts of coolant for the 6-speed automatic with a CVTDA setup, or 7.2 quarts for the manual transmission configuration. AMSOIL Passenger Car & Light Truck Antifreeze & Coolant is a 50/50 pre-mix formulation that protects all cooling system metals, gaskets, and hoses. It is phosphate-, nitrate-, and silicate-free, making it compatible with a wide variety of engines without causing corrosion. For those who prefer a concentrated formula, the Propylene Glycol Antifreeze and Engine Coolant offers up to 150,000 miles of protection and is ideal for extreme temperature ranges.
Brake Fluid and Additional Maintenance
The braking system on the MAZDA6 relies on DOT 3 hydraulic fluid. AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid is designed to maintain excellent ABS and traction-control responsiveness. Unlike conventional fluids that can absorb moisture over time, leading to a lower boiling point and brake fade, this synthetic fluid provides a stable viscosity over a wide temperature range. This stability is crucial for safe driving, especially in mountainous areas or during spirited driving sessions where brake temperatures can rise significantly.
For vehicle owners who engage in seasonal storage, additional products can help preserve the vehicle’s health. AMSOIL Gasoline Stabilizer keeps fuel fresh for up to 12 months, preventing varnish and gum buildup. For engines that will sit idle for extended periods, AMSOIL Engine Fogging Oil provides a rust preventive coating for internal components. On the cleaning front, AMSOIL P.i. Performance Improver Gasoline Additive can restore up to 14% horsepower by cleaning fuel injectors, which is particularly beneficial for Direct Injection engines found in modern Mazdas. These additives ensure that the engine runs efficiently regardless of the season.
Vehicle Background
About the 2018 Mazda MAZDA6
The 2018 Mazda MAZDA6 represents a significant milestone in the brand’s evolution, marking a period where Mazda fully embraced its “Kodo” design philosophy, characterized by sleek, motion-filled lines that make the sedan appear as if it is in constant movement. This generation of the MAZDA6 solidified the brand’s reputation in the mid-size sedan segment, often competing directly with the Toyota Camry and Honda Accord but offering a sportier, more engaging driving experience. The 2018 model year continued to refine the interior craftsmanship, introducing higher-quality materials and a more intuitive infotainment system, reflecting Mazda’s push into the premium market.
At the heart of this sedan is the 2.5-liter SkyActiv-G four-cylinder engine. Known for its high compression ratio, this engine delivers a responsive powerband that feels more robust than its displacement would suggest. It is designed for efficiency without sacrificing performance, offering a balance that appeals to drivers who enjoy the act of driving rather than just commuting. The engine is paired with either a 6-speed automatic or a 6-speed manual transmission, both of which are praised for their smooth shifting characteristics and ability to translate engine power to the road effectively. The manual transmission option in particular makes this a favorite among driving enthusiasts in a segment where manual gearboxes are becoming increasingly rare.
While the 2018 MAZDA6 is celebrated for its reliability and build quality, owners should be aware of a few common issues that can arise over time. One known concern is the potential for carbon buildup in the direct injection system, which can affect performance and fuel economy over the vehicle’s life. High-quality synthetic motor oils and fuel additives like AMSOIL P.i. can help mitigate this issue by keeping injectors clean. Another area of attention is the rear suspension bushings; on some models, these can wear out faster than expected, leading to a slight clunking sound or a feeling of looseness in the rear end when going over bumps. Regular inspections and the use of proper lubricants in suspension components can delay wear.
Additionally, some owners have reported issues with the infotainment system freezing or lagging, which can be frustrating for a car in this price range. While this is an electronics issue rather than a mechanical one, keeping the vehicle’s systems updated is key. Finally, as with many modern sedans, the fuel system can sometimes experience issues with the fuel pump relay or the fuel pump itself, leading to stalling or no-start conditions. Monitoring fuel system health and using a fuel injector cleaner can help maintain consistent fuel flow and prevent costly repairs. By addressing these potential problems proactively with the right maintenance products, MAZDA6 owners can enjoy many years of reliable and enjoyable driving.