The 2018 Chevrolet Malibu equipped with the 1.5L turbocharged engine represents a significant step forward in fuel efficiency and performance for the mid-size sedan segment. However, modern turbocharged powerplants operate under higher stress and temperatures than their naturally aspirated predecessors. To ensure this specific engine performs reliably for miles to come, utilizing the correct lubricants is essential. The GM Dexos1 Gen 3 specification is critical for this vehicle, as it addresses specific turbocharger protection and sludge resistance requirements that standard oils may miss. By adhering to these precise fluid specifications, owners can maximize the longevity of their Malibu while maintaining the intended fuel economy and power delivery.
Recommended AMSOIL Products
For the 2018 Chevrolet Malibu 1.5L engine, AMSOIL provides a comprehensive selection of synthetic lubricants designed to meet and exceed GM Dexos1 Gen 3 requirements. The following products are the ideal choices for maintaining peak performance.
- AMSOIL Signature Series 0W-20 100% Synthetic Motor Oil – Offers unsurpassed engine protection and is the top recommendation for maximum durability and wear resistance, featuring 75% more protection against horsepower loss compared to industry standards.
- AMSOIL Extended-Life 0W-20 100% Synthetic Motor Oil – An excellent choice for drivers seeking extended service intervals up to 20,000 miles, offering superior cleaning power to keep the engine running smoother for longer.
- AMSOIL OE 0W-20 100% Synthetic Motor Oil – Specifically formulated to outperform conventional oils while meeting OEM requirements, providing reliable protection for turbochargers and fighting sludge effectively.
- AMSOIL 0W-20 100% Synthetic High-Mileage Motor Oil – Designed for vehicles with over 75,000 miles, this formula contains unique chemistry to boost detergency and reduce sludge, helping older engines perform better.
- AMSOIL Oil Filter – Engineered to provide 99% filtering efficiency at 20 microns, this filter holds more contaminants than competing brands to reduce engine wear and extend service life.
- WIX Oil Filter – A premium alternative option that offers improvements over standard OEM-branded filters with high-quality media for superior filtration.
- AMSOIL Passenger Car & Light Truck Antifreeze & Coolant – A ready-to-use 50/50 pre-mix that protects cooling system metals and hoses for up to 150,000 miles, suitable for a wide variety of vehicle applications.
- AMSOIL Propylene Glycol Antifreeze and Engine Coolant – A concentrated option for those who prefer mixing their own coolant, offering extended service intervals up to 150,000 miles and protection against severe corrosion.
- AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – Delivers exceptional protection for the 6T40 transmission, withstanding heavy towing, elevated temperatures, and remaining fluid in sub-zero conditions.
- AMSOIL OE Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – Provides cost-effective yet robust protection against wear, ensuring smooth shifting and longevity for the automatic transmission.
- AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid – Enhances braking performance with excellent ABS and traction-control responsiveness while maintaining stable viscosity across a wide temperature range.
Understanding the specific fluid capacities for your 2018 Malibu is just as important as choosing the right product. For the 1.5L turbocharged engine, the oil capacity is 4.2 quarts when changing the filter, with a torque specification of 18 ft/lbs for the oil drain plug. It is crucial to refill the engine and then check the oil level immediately after the refill to ensure the correct amount is used. For the cooling system, the total capacity is 6.7 quarts, requiring a high-quality antifreeze that protects against corrosion and freezing. The 6-speed automatic transmission (6T40) has a total fill capacity of 9 quarts, though initial fills may require around 6.3 quarts. Using the correct volume ensures proper hydraulic pressure and cooling within the transmission.
Why Proper Lubrication Matters for the 1.5L Turbo Engine
The 1.5L engine in the 2018 Malibu relies on precise engineering to balance power output with fuel economy. Turbocharging forces more air into the combustion chamber, generating significant heat that can degrade standard mineral oils rapidly. Without high-quality synthetic lubricants, the turbocharger bearings can suffer from coking, a process where oil carbonizes due to extreme heat after the engine is turned off. AMSOIL Signature Series 0W-20 is specifically tested to resist this phenomenon, protecting the turbocharger 72% better than required by GM’s older Dexos1 Gen 2 specifications.
Furthermore, modern direct injection engines are prone to low-speed pre-ignition (LSPI), a detonation event that can cause catastrophic engine failure. AMSOIL’s advanced additive packages are formulated to eliminate LSPI events, ensuring safe operation even under heavy acceleration. By using AMSOIL filters alongside the oil, you ensure that these critical components are kept free of contaminants. The filters’ media efficiency captures microscopic wear particles that would otherwise circulate and cause abrasive wear on cylinder walls and bearing surfaces. This proactive approach to lubrication extends the life of the engine and maintains its performance characteristics over time.
In addition to engine oil, the transmission and cooling systems demand specific attention. The 6T40 transmission is a complex assembly with tight tolerances. A dedicated synthetic transmission fluid reduces friction, improves shift quality, and prevents the fluid from breaking down under the stress of highway merging or towing. AMSOIL’s transmission fluids remain fluid in sub-zero temperatures, ensuring quick lubrication upon startup, and provide reserve protection during heavy use. For the cooling system, the high operating temperatures of the turbo engine require a coolant that prevents corrosion in aluminum components. The ethylene glycol-based AMSOIL antifreeze offers protection for up to five years or 150,000 miles, safeguarding the radiator, water pump, and heater core from degradation.
About the Vehicle
The 2018 Chevrolet Malibu is a quintessential mid-size sedan that blends comfort, efficiency, and modern styling. Introduced as a completely redesigned model for the 2016 model year, the eighth-generation Malibu shed its heavy, boxy predecessor for a sleek, aerodynamic design that rivals sportier competitors. It sits on GM’s E2XX platform, a shared architecture that underpins many of the brand’s modern vehicles, providing a solid foundation for a smooth and comfortable ride. The vehicle is known for its spacious interior, which offers class-leading rear-seat legroom, making it a practical choice for families and commuters alike.
Powering the 2018 Malibu is a choice of efficient gasoline engines, with the 1.5L turbocharged four-cylinder being the standard and most popular option. This engine, part of GM’s Dynamic Fuel Management family, delivers a strong balance of power and fuel economy. It produces roughly 160 horsepower and 184 lb-ft of torque, which is ample for everyday driving and highway merging. The engine is paired with a six-speed automatic transmission designed for smooth power delivery. For those seeking even more power, a 2.0L turbo option was available, but the 1.5L remains the volume leader due to its 36 MPG highway rating.
Owners of the 2018 Malibu often appreciate the vehicle’s refined driving character, which is surprisingly quiet and composed. The interior design is a highlight, featuring a driver-centric cockpit with a modern infotainment system that responds quickly. However, like many vehicles from this era with advanced engines, the 2018 Malibu has a few specific issues that owners should be aware of. One common concern is excessive oil consumption in the 1.5L engine, where the turbocharger seals or piston rings may allow oil to burn or leak over time. Another potential problem is carbon buildup on the intake valves due to direct injection, which can lead to rough idling or misfires if left unchecked. Some owners have also reported issues with the timing chain tensioner or guides, which can sometimes rattle during cold starts, and occasional electrical glitches with the infotainment system or sensor failures. Utilizing high-quality synthetic motor oil and additives can help mitigate these issues by keeping the engine cleaner and providing superior protection against wear, potentially extending the life of critical components and reducing the frequency of these common troubles.
The Malibu’s reputation as a reliable, comfortable, and fuel-efficient sedan is bolstered by its strong safety ratings and user-friendly features. It represents a solid value proposition in a competitive market, offering a lot of car for the money. Whether used for daily commuting or long road trips, the 2018 Malibu is a capable machine that rewards owners who maintain it with the highest quality fluids available. By staying on top of maintenance with AMSOIL products, owners can ensure their Malibu remains a joy to drive for many years to come.
Seasonal and Additional Care
While engine and transmission fluids are the most critical components of a maintenance routine, there are other fluids and additives that can enhance the ownership experience. For drivers storing their vehicle during winter or periods of non-use, AMSOIL Gasoline Stabilizer keeps fuel fresh for up to 12 months, preventing varnish and gum buildup that can clog fuel injectors. Similarly, AMSOIL Engine Fogging Oil is ideal for protecting internal components during long-term storage, especially for engines that may not run frequently. For those concerned with fuel economy and performance, AMSOIL P.i.® Performance Improver is a powerful gasoline additive that restores horsepower and cleans GDI fuel injectors, helping to reverse the carbon buildup that often plagues direct injection engines.
Additionally, protecting the vehicle’s exterior and interior from the elements contributes to its longevity and resale value. AMSOIL Silicone Spray provides a dry lubricating film that protects rubber and plastic components from cracking and drying out, while the Heavy-Duty Metal Protector offers a long-lasting barrier against salt and moisture, ideal for preventing rust in harsh climates. For routine cleaning, the Power Foam® Carburetor and Induction-System Cleaner removes deposits from the intake system, maximizing horsepower and startability. These products, along with the specialized cleaning agents like the Brake and Parts Cleaner and Engine Degreaser, ensure that every aspect of the 2018 Malibu receives the attention it needs to perform at its best.
Ultimately, the goal is to keep the 2018 Chevrolet Malibu running smoothly and efficiently for the long haul. By combining the right synthetic motor oils with the appropriate filters, transmission fluids, and coolants, owners can protect their investment against the wear and tear of daily driving. Whether facing extreme cold, hot summer heat, or the rigors of city traffic, AMSOIL’s comprehensive range of products provides the confidence that the vehicle is receiving the best possible care. With the ability to extend service intervals and the assurance of rigorous testing, AMSOIL remains the preferred choice for drivers who demand the absolute best for their vehicles.