2018 Chevrolet Cruze Specs – The Ultimate Engine And Maintenance Guide
The 2018 Chevrolet Cruze offers a versatile lineup featuring both sedan and hatchback body styles, powered by efficient turbocharged gas and diesel engines. This guide provides the technical data and maintenance requirements necessary for owners and DIY mechanics to keep their vehicles running at peak performance.
Finding a reliable daily driver that balances fuel economy with modern features can be a challenge for many car shoppers. If you are currently researching or maintaining this compact car, understanding the 2018 chevrolet cruze specs is the first step to ensuring your vehicle stays on the road for the long haul.
This article will break down the engine configurations, transmission choices, and essential fluid requirements for every trim level. We will also dive into common mechanical issues and provide actionable advice for the weekend warrior looking to handle their own repairs.
Whether you are interested in real-world efficiency or need a deep dive into the turbocharger system, we have you covered. Let’s get under the hood and look at what makes this generation of the Cruze a standout in the compact segment.
Decoding the 2018 chevrolet cruze specs for Engine Performance
The heart of the 2018 Cruze is its choice of two distinct powerplants, both designed with efficiency and torque in mind. Most models you find on the road will be equipped with the 1.4L LE2 Turbocharged Engine, which is an all-aluminum design that saves weight over previous generations.
This gas engine produces 153 horsepower and 177 lb-ft of torque, providing plenty of pep for highway merging and city driving. It utilizes a Direct Fuel Injection System to spray fuel directly into the combustion chamber, which improves thermal efficiency and power delivery.
For those who prioritize long-distance cruising, the 1.6L LH7 Turbo Diesel is a rare but highly capable option. This engine is often nicknamed the “whisper diesel” due to its refined operation and impressive 240 lb-ft of torque, making it a favorite for high-mileage commuters.
Gasoline Engine: 1.4L Turbo (LE2)
The 1.4L LE2 engine is the workhorse of the Cruze lineup, found in the L, LS, LT, and Premier trims. It features a dual overhead cam (DOHC) design and variable valve timing to optimize the air-fuel mixture across the entire RPM range.
One critical detail for DIYers is the Spark Plug Gap Specifications, which are set at 0.028 inches (0.70mm). Using the correct gap is essential to prevent misfires, especially under the high-pressure environment of a turbocharged engine.
Diesel Engine: 1.6L Turbo (LH7)
The diesel variant is a standout for its fuel economy, often rivaling hybrid vehicles on the open road. It uses a variable geometry turbocharger to reduce lag and provide a smooth, linear power curve that feels more robust than its 137 horsepower suggests.
Maintenance for the LH7 requires a bit more attention, specifically regarding the Diesel Exhaust Fluid (DEF) system. Always ensure you use high-quality DEF and keep the tank topped off to avoid the vehicle entering a “limp mode” or reduced power state.
Transmission Options and Drivetrain Details
Chevrolet offered three different transmissions for the 2018 model year, depending on the engine choice and trim level. A detailed look at the 2018 chevrolet cruze specs reveals that the diesel variant received the most advanced gearbox in the lineup.
The standard gas models typically come with the 6T35 6-Speed Automatic Transmission. This unit is designed for smooth shifts and reliability, though it requires regular fluid exchanges to prevent solenoid wear and shifting hesitations over time.
Enthusiasts may still find the 6-speed manual transmission available on certain trims, offering a more engaging driving experience. However, the 9T45 9-Speed Automatic Transmission paired with the diesel engine is the pinnacle of the Cruze’s drivetrain technology, providing optimal gear ratios for highway efficiency.
The 6-Speed Automatic (6T35)
This transmission is a transverse-mounted unit that uses a torque converter with an electronic controlled capacity clutch. It is vital to check for leaks around the axle seals, as low fluid levels can lead to premature clutch plate wear.
If you notice “hunting” for gears or harsh shifts, it may be time to scan for codes or perform a fluid refresh. Always use the specified fluid to maintain the correct viscosity and friction characteristics required by the internal components.
The 9-Speed Automatic (9T45)
Exclusive to the diesel model, the 9-speed automatic helps the 1.6L engine stay in its power band while keeping RPMs low at cruising speeds. This transmission is a “fill-for-life” unit according to some manuals, but experienced techs recommend a fluid change every 45,000 to 60,000 miles.
The extra gears allow for a very low first gear for quick take-offs and multiple overdrive gears for maximum MPG. It represents a significant step up in refinement compared to the older 6-speed units found in competitor performance models from the same era.
Essential Maintenance and Fluid Specifications
To keep your Cruze running smoothly, you must adhere to the specific fluid requirements dictated by General Motors. For the 1.4L gas engine, using Dexos1 Gen 2 Motor Oil is non-negotiable to protect the turbocharger bearings and prevent low-speed pre-ignition (LSPI).
The cooling system relies on Dex-Cool Extended Life Coolant, which is formulated to protect aluminum components from corrosion. Mixing this with generic green coolant can lead to “sludging,” which will eventually clog your heater core and radiator.
For those performing their own oil changes, the 1.4L engine typically requires 4.2 quarts of 5W-30 synthetic oil. Always replace the oil filter with a high-quality unit to ensure proper oil flow to the Integrated PCV Valve Cover Assembly, which is a known sensitive area.
Diagnostic and Capacity Quick Reference
| Component | Specification/Type | Capacity (Approx) |
|---|---|---|
| Engine Oil (1.4L Gas) | SAE 5W-30 Dexos1 Gen 2 | 4.2 Quarts (4.0 Liters) |
| Engine Oil (1.6L Diesel) | SAE 5W-30 Dexos2 | 5.3 Quarts (5.0 Liters) |
| Coolant | Dex-Cool (50/50 Mix) | 7.5 Quarts (7.1 Liters) |
| Spark Plug Gap | 0.028 in (0.70 mm) | N/A |
Common Troubleshooting and Diagnostic Codes
Even with meticulous care, the 2018 Cruze can develop specific issues that trigger the Check Engine Light. One of the most frequent errors encountered by owners is the P0299 Turbocharger Underboost Code, which often points to a vacuum leak or a failing wastegate.
Another common culprit is the valve cover. The Integrated PCV Valve Cover Assembly contains a non-serviceable diaphragm that can rupture, causing a high-pitched whistling sound and rough idling. When this happens, the entire valve cover must be replaced.
Regularly referencing the 2018 chevrolet cruze specs is vital for choosing the right parts when these issues arise. For example, using the wrong spark plugs or failing to gap them correctly can lead to phantom codes that are difficult to diagnose without the right technical data.
Solving the P0299 Underboost Issue
If you experience a sudden loss of power on the highway, your turbocharger may not be providing enough boost. Check all rubber charge pipes for cracks or loose clamps, as even a small air leak can trigger the P0299 code.
In some cases, the boost solenoid or the bypass valve may be stuck. Before replacing the entire turbocharger, which is expensive, ensure that the vacuum lines are intact and the intercooler is not obstructed by debris.
The PCV System Failure
The PCV (Positive Crankcase Ventilation) system on the 1.4L LE2 engine is complex. If the check valve inside the intake manifold fails, it can put excessive pressure on the valve cover diaphragm, causing it to burst.
Always inspect the intake manifold check valve when replacing a blown valve cover. If you ignore the manifold, your brand-new valve cover will likely fail again within a few hundred miles, leading to a frustrating cycle of repairs.
Interior Dimensions and Cargo Versatility
The 2018 Cruze is praised for its interior packaging, especially in the hatchback configuration. It offers a surprising amount of room for a compact car, making it a viable option for small families or outdoor enthusiasts who need to haul gear.
The sedan provides 14.8 cubic feet of trunk space, which is competitive for its class. However, the hatchback shines with 22.7 cubic feet behind the rear seats, expanding to 47.2 cubic feet when the seats are folded flat.
Technology-wise, most models come equipped with a 7-inch or 8-inch touchscreen featuring Apple CarPlay and Android Auto. This integration allows you to access navigation and music seamlessly, which is a major selling point for younger buyers and tech-savvy commuters.
Trim Level Highlights
- L and LS: These are the base trims, offering essential features like a rearview camera and the Chevrolet MyLink system.
- LT: The mid-level trim adds steering wheel-mounted controls, a 6-speaker audio system, and available satellite radio.
- Premier: The top-tier trim features leather-appointed seating, ambient lighting, and an upgraded rear suspension for better handling.
For more technical DIY guides, you can look at how Chevrolet structures its trim packages across other models. This helps in understanding which features are interchangeable and which require specific wiring harnesses.
Safety Features and Driver Assistance
Safety was a priority for the 2018 model year, and the Cruze comes standard with ten airbags. It also features the Teen Driver system, which allows parents to set speed alerts and volume limits for secondary drivers.
Available active safety features include Forward Collision Alert, Lane Keep Assist, and Rear Park Assist. These systems use a combination of camera and radar sensors to monitor the vehicle’s surroundings and provide warnings to the driver.
The chassis is constructed with high-strength steel in key areas to improve crashworthiness. This rigid structure not only provides better protection in an accident but also contributes to the car’s quiet and composed ride quality on the highway.
Frequently Asked Questions About 2018 chevrolet cruze specs
What is the oil capacity for the 2018 Chevrolet Cruze 1.4L engine?
The 1.4L LE2 turbocharged engine has an oil capacity of 4.2 quarts (approximately 4.0 liters) when changing both the oil and the filter. It is essential to use synthetic 5W-30 oil that meets the Dexos1 Gen 2 specification to protect the turbocharger.
Does the 2018 Chevrolet Cruze have a timing belt or a timing chain?
Both the 1.4L gas engine and the 1.6L diesel engine in the 2018 Cruze use a timing chain. Unlike a timing belt, a chain is designed to last the life of the engine, provided that regular oil changes are performed to keep the tensioners lubricated.
Where can I find the official 2018 chevrolet cruze specs for my specific VIN?
You can find specific details for your vehicle by checking the door jamb sticker for tire pressure and weight ratings. For engine and transmission codes, the RPO (Regular Production Option) sticker is usually located in the trunk area or glovebox.
What is the fuel tank capacity of the 2018 Cruze?
The fuel tank capacity varies slightly by model. Most gas-powered sedans have a 13.7-gallon tank, while the diesel models and some hatchbacks may feature a smaller 12.1-gallon or 13.5-gallon tank to accommodate different suspension or emissions components.
Final Thoughts for the Cruze Owner
The 2018 Chevrolet Cruze remains a strong contender in the used market thanks to its balanced performance and modern interior. By staying on top of the specific maintenance needs of the 1.4L turbo or 1.6L diesel engines, you can avoid common pitfalls and enjoy a reliable driving experience.
Remember that using the correct fluids, such as Dexos1 Gen 2 oil and Dex-Cool coolant, is the most important thing you can do for the longevity of the vehicle. If you encounter a check engine light, don’t ignore it; small issues like a PCV leak can quickly turn into more expensive repairs if left unaddressed.
Take pride in your maintenance, use the right tools, and don’t be afraid to get your hands dirty. With the right knowledge and a proactive approach, your Cruze will continue to be a dependable partner on all your journeys. Stay safe and happy wrenching!
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