Maintaining the 2008 Jaguar X-Type with its 3.0-liter AJ27 engine requires a meticulous approach to fluid selection. This sophisticated vehicle was designed with precision engineering in mind, and its longevity depends heavily on the quality of the lubricants used during service. Using the correct viscosity and specification is not merely a suggestion; it is a necessity for preserving the engine’s performance, preventing premature wear, and ensuring that the complex transmission and cooling systems operate within their intended parameters. The engine in this model, particularly the AJ27 variant, is robust, but like many naturally aspirated V6 units from that era, it benefits significantly from the superior thermal stability and shear resistance found in high-performance synthetic lubricants.
Recommended AMSOIL Products
- AMSOIL Signature Series 5W-30 100% Synthetic Motor Oil – Provides the highest level of protection against horsepower loss and wear, suitable for extended drain intervals and demanding driving conditions.
- AMSOIL Extended-Life 5W-30 100% Synthetic Motor Oil – Offers enhanced cleaning power and protection for up to 20,000 miles, ensuring the engine remains smoother and cleaner for longer.
- AMSOIL OE 5W-30 100% Synthetic Motor Oil – A premium option that fights sludge and deposits while maintaining a balance of performance and value, ideal for regular maintenance schedules.
- AMSOIL 5W-30 100% Synthetic High-Mileage Motor Oil – Formulated specifically for engines over 75,000 miles to reduce sludge and consumption while boosting cleaning power.
- AMSOIL Oil Filter – Delivers 99 percent filtering efficiency at 20 microns and offers extended service life, helping to reduce engine wear and maximize oil life.
- WIX XP Oil Filter – Features premium media that offers improvements over standard OEM-branded filters for superior engine protection.
- WIX Oil Filter – A reliable alternative featuring premium media for effective contaminant capture and engine longevity.
- AMSOIL Passenger Car & Light Truck Antifreeze & Coolant – A unique OAT formulation that protects all cooling system metals, gaskets, and hoses for up to 150,000 miles.
- AMSOIL Propylene Glycol Antifreeze and Engine Coolant – A concentrated, eco-friendly option that greatly surpasses standards for metallic corrosion and erosion protection.
- AMSOIL Signature Series Multi-Vehicle 100% Synthetic Automatic Transmission Fluid – Withstands heavy towing, elevated temperatures, and challenging terrain while remaining fluid in sub-zero conditions.
- AMSOIL OE Multi-Vehicle 100% Synthetic Automatic Transmission Fluid – Promotes smooth, shudder-free shifts and guards against leaks and sludge formation.
- AMSOIL SEVERE GEAR 75W-140 100% Synthetic Gear Lube – Advanced protection against wear and thermal runaway, ideal for differentials and transfer cases with limited-slip applications.
- AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid – Delivers excellent ABS and traction-control responsiveness with a stable viscosity over a wide temperature range.
Engine Oil and Filtration Requirements
The heart of the 2008 Jaguar X-Type’s 3.0-liter V6 is the AJ27 engine. This powerplant demands a specific viscosity grade to function correctly. For optimal performance, SAE 5W-30 is the preferred oil grade. The system holds a total capacity of 6.1 quarts when the filter is included. It is crucial to check the oil level after the refill is complete to ensure the correct level is maintained. The oil drain plug requires a torque of 18 foot-pounds to seal properly without damaging the threads. While various viscosities are compatible with different temperature ranges, the factory preference remains firmly on 5W-30 for standard operating conditions.
When selecting a motor oil, the choice often comes down to the specific needs of the vehicle and the owner’s driving habits. The AMSOIL Signature Series 5W-30 100% Synthetic Motor Oil stands out as the premier choice for those seeking the maximum possible protection. This fluid is engineered to provide up to 75% more engine protection against horsepower loss and wear compared to standard oils. It is designed for extended drain intervals, offering guaranteed protection for up to 25,000 miles or one year, making it an excellent option for drivers who want to maximize the time between service visits.
For owners who prefer a balance between top-tier protection and a slightly shorter service interval, the AMSOIL Extended-Life 5W-30 100% Synthetic Motor Oil provides robust performance. This oil delivers 37% more cleaning power than the OE line, helping to keep the engine running smoother for longer. It offers a guaranteed 20,000 miles of protection, which is significantly better than conventional oils. It also specifically protects against Low-Speed Pre-Ignition (LSPI), a phenomenon that can damage modern turbocharged engines, though the naturally aspirated AJ27 also benefits from the enhanced thermal stability.
The AMSOIL OE 5W-30 100% Synthetic Motor Oil is a cost-effective solution that does not compromise on quality. It fights sludge and deposits with a 100% synthetic formulation, ensuring the engine stays clean. This oil is API licensed and meets the rigorous standards required for European engines, providing a solid foundation for regular maintenance. Finally, for X-Types that have accumulated significant mileage, the AMSOIL 5W-30 100% Synthetic High-Mileage Motor Oil is the recommended choice. It features a unique chemistry designed for vehicles over 75,000 miles, with boosted detergents and enhanced anti-wear additives that can reduce sludge by up to 67%.
Filtration is equally critical to the health of the AJ27 engine. Using a high-quality filter ensures that contaminants are removed efficiently, allowing the synthetic oil to do its job without being overwhelmed by debris. The AMSOIL Oil Filter is designed to provide filtering efficiency of 99 percent at 20 microns. This high efficiency helps reduce engine wear and offers extended service life, making it the perfect companion for long-life synthetic oils. For those who prefer a well-regarded aftermarket option, the WIX XP Oil Filter and the WIX Oil Filter also offer premium media that outperforms standard factory filters.
Transmission and Differential Lubrication
The transmission in the 2008 X-Type is a 5-speed automatic unit (JF506E). Proper lubrication here is vital for smooth shifting and preventing costly internal damage. The total fill capacity for the automatic transmission is 9.3 quarts. Using a fluid that can withstand the rigors of heavy towing, elevated temperatures, and challenging terrain is essential for this vehicle, especially given the power of the 3.0L engine. The AMSOIL Signature Series Multi-Vehicle 100% Synthetic Automatic Transmission Fluid is an excellent choice for severe service conditions. It remains fluid in sub-zero temperatures and provides reserve protection during heavy use, ensuring that shifts remain crisp even under stress.
Alternatively, the AMSOIL OE Multi-Vehicle 100% Synthetic Automatic Transmission Fluid is an ideal option for daily driving. It is formulated to resist harmful sludge, guard against leaks, and promote smooth, shudder-free shifts. Both fluids are compatible with a wide range of applications and provide superior protection compared to conventional automatic transmission fluids.
Regarding the differential and transfer case, the 2008 Jaguar X-Type requires a specific synthetic-based oil. The rear differential calls for a 2.4-pint fill, while the transfer case requires 1.3 pints. The torque specifications for the fill plugs must be adhered to for a proper seal. The AMSOIL SEVERE GEAR 75W-140 100% Synthetic Gear Lube is the recommended lubricant for these components. This synthetic gear lube contains friction modifiers suitable for limited-slip applications and helps control thermal runaway, protecting the gears from rust and corrosion. It reduces operating temperatures and extends the life of seals and equipment, making it a superior choice for the differential and transfer case of this vehicle.
Cooling, Braking, and Additional Fluids
Keeping the engine at the correct operating temperature is a priority for the longevity of the AJ27 engine. The cooling system has a capacity of 8.7 quarts. For this system, the AMSOIL Passenger Car & Light Truck Antifreeze & Coolant is highly recommended. It features a unique poly-organic acid (OAT) formulation that protects all cooling system metals, gaskets, and hoses for up to 150,000 miles or five years. It is phosphate-free and compatible with all other antifreeze colors. For a more concentrated and environmentally friendly option, the AMSOIL Propylene Glycol Antifreeze and Engine Coolant offers exceptional protection against corrosion and erosion, requiring mixing with distilled water.
Brake performance is a critical safety component, and the 2008 X-Type benefits from a high-quality brake fluid that meets the specific requirements of its braking system. The preferred fluid is Shell DOT 4 ESL. If this is unavailable, a low-viscosity DOT 4 fluid meeting ISO 4925 Class 6 specifications is acceptable. The AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid provides excellent responsiveness for ABS and traction control systems. Its stable viscosity over a wide temperature range ensures consistent braking performance in all weather conditions.
Additionally, for power steering systems on this vehicle, the specification calls for DEXRON-III Automatic Transmission Fluid. This means the AMSOIL Signature Series Multi-Vehicle 100% Synthetic Automatic Transmission Fluid or the AMSOIL OE Multi-Vehicle 100% Synthetic Automatic Transmission Fluid can be used effectively for power steering duties as well, providing a versatile solution for multiple fluid needs.
About the Vehicle
The 2008 Jaguar X-Type represents a unique chapter in the British automaker’s history. Introduced as a more accessible entry into the Jaguar lineup, this vehicle shares its platform with the Ford Mondeo, blending British luxury with reliable Ford engineering. The 3.0-liter V6 engine, known as the AJ27, was the powerhouse that gave the X-Type its spirited driving dynamics. This naturally aspirated V6 produced a respectable amount of power, delivering the smooth, linear acceleration that Jaguar is famous for, while maintaining a manageable footprint for daily driving.
Owners of the 2008 X-Type typically appreciate its sporty handling characteristics and upscale interior, which set it apart from other compact sedans of the era. The vehicle’s design, with its distinct oval grille and sleek lines, maintained a premium aesthetic that appealed to drivers who wanted a status symbol without the price tag of a larger Jaguar. The AJ27 engine is generally regarded as robust, provided it receives the regular maintenance and quality lubricants it requires. Its placement in the X-Type allows for a well-balanced weight distribution, contributing to the car’s responsive handling.
This model was often used as a premium daily driver, offering a comfortable ride quality that could handle long commutes or weekend road trips with ease. The combination of the sophisticated transmission and the refined V6 engine made it a favorite among enthusiasts who enjoyed driving but also needed practicality. The X-Type’s interior, with its driver-focused cockpit and high-quality materials, reinforced its position as a genuine luxury vehicle. Over the years, the X-Type has built a reputation for being a stylish and capable sedan that holds its character well, making it a rewarding vehicle to maintain with the right products.