Keeping your 2008 Dodge RAM 1500 Pickup running smoothly requires more than just a routine fill-up; it demands the correct lubricants tailored to its 5.7L HEMI engine and specific drivetrain requirements. This truck relies on precise viscosity grades and high-quality additives to handle heavy loads, towing, and varying weather conditions. Selecting the right fluids ensures optimal performance, extends the life of critical components, and maintains the vehicle’s reliability over the years.
Recommended AMSOIL Products
For the 2008 Dodge RAM 1500 Pickup with the 5.7L V8 engine, using the correct viscosity is critical. Vehicles equipped with the Multiple Displacement System (MDS) specifically require SAE 5W-20 motor oil. To meet the needs of this engine, AMSOIL offers a range of synthetic options that outperform conventional oils in protecting against wear and maintaining cleanliness.
- AMSOIL Signature Series 5W-20 100% Synthetic Motor Oil – This premium motor oil provides the highest level of protection, offering up to 75% more engine resistance against horsepower loss and wear. It is formulated to deliver superior performance for up to 25,000 miles or one year, making it an excellent choice for truck owners who want maximum durability.
- AMSOIL Extended-Life 5W-20 100% Synthetic Motor Oil – A robust option that delivers 37% more cleaning power than the OE Synthetic line to help keep your engine running smoother for longer. It provides guaranteed protection for up to 20,000 miles or one year and includes enhanced LSPI protection for the HEMI engine.
- AMSOIL OE 5W-20 100% Synthetic Motor Oil – Designed to match or exceed original equipment manufacturer specifications, this oil fights sludge and deposits effectively. It is an ideal choice for maintaining OEM mileage and ensuring the engine stays clean and efficient.
- AMSOIL 5W-20 100% Synthetic High-Mileage Motor Oil – This fluid features a unique chemistry for vehicles with over 75,000 miles. It includes boosted detergents and dispersants to help clean existing deposits and reduce sludge by 67%, revitalizing engines that need extra care.
- AMSOIL Oil Filter (EAO11) – This high-efficiency filter allows for lower restriction to keep engine parts lubricated and captures small, wear-causing contaminants with 99% efficiency at 20 microns, significantly reducing engine wear compared to competing filters.
- WIX Oil Filter (57899) – An excellent alternative featuring premium media that offers improvements over original equipment manufacturer-branded filters, ensuring your oil change kit is complete with a reliable filtration component.
The engine capacity for a 2008 RAM 1500 with the 5.7L engine is 7.0 quarts when including the filter. When performing an oil change, ensure the oil drain plug is torqued to 25 ft/lbs. Always check the oil level after refilling to ensure the correct quantity has been added.
Transmission and Cooling System Fluids
Proper lubrication extends beyond the engine. The transmission in your RAM 1500 requires a fluid that can withstand the rigors of heavy towing, elevated temperatures, and challenging terrain. For the 4-speed 42RLE automatic transmission, a total fill requires 8.8 quarts, while the 5-speed 545RFE (available in both 4WD and RWD configurations) requires significantly more, with a total fill capacity of 16.9 quarts. The initial fill amounts vary, with the 42RLE needing 4 quarts and the 545RFE needing between 5.5 and 6.6 quarts depending on the configuration.
Using AMSOIL Signature Series Multi-Vehicle 100% Synthetic Automatic Transmission Fluid provides excellent protection against sludge and wear, ensuring smooth, shudder-free shifts even in extreme conditions. For those looking for a high-value option that still meets stringent specifications, AMSOIL OE Multi-Vehicle 100% Synthetic Automatic Transmission Fluid is a capable alternative that resists harmful deposits and promotes long-term transmission health. A WIX Transmission Filter should be used to capture debris and maintain fluid cleanliness during service.
The cooling system is equally vital for a truck of this caliber. The 5.7L HEMI engine has a coolant capacity of 18.7 quarts. To prevent corrosion and manage heat effectively, AMSOIL Passenger Car & Light Truck Antifreeze & Coolant is a ready-to-use, ethylene glycol 50/50 pre-mix formulation. It offers protection for up to 150,000 miles or 5 years. For a concentrated option that requires mixing with distilled water, AMSOIL Propylene Glycol Antifreeze and Engine Coolant provides extended protection up to 1,000,000 miles in heavy-duty applications and is free from phosphates and nitrates.
Gear Lubes and Brake Fluids
The differential and transfer case lubrication requirements for the 2008 RAM 1500 vary based on the specific axle and transfer case model. Front differentials, such as the Corporate C205F, require 3.4 pints of GL-5 fluid. Rear differentials, whether standard or limited slip, also utilize GL-5 lubricants, with capacities ranging from 4.4 to 4.6 pints depending on whether a limited-slip device is installed. Transfer cases like the NV241 GENII, NV243, NV244 GENII, NV271, and NV273 generally require small quantities, typically around 3.4 to 4 pints.
AMSOIL SEVERE GEAR® lubricants are designed to handle these heavy-duty applications. For the front differential and many transfer cases, AMSOIL SEVERE GEAR® 75W-90 100% Synthetic Gear Lube offers advanced protection against wear and helps control thermal runaway. If your rear differential is equipped with a limited-slip device, a thicker fluid like AMSOIL SEVERE GEAR® 75W-140 100% Synthetic Gear Lube is recommended to ensure the friction modifiers function correctly. Other viscosity options, such as AMSOIL SEVERE GEAR® 80W-90 or AMSOIL SEVERE GEAR® 75W-110, provide specialized protection for various operating conditions.
For the hydraulic brake system, the 2008 RAM 1500 utilizes DOT 3 fluid meeting MS-4574 specifications. AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid is an excellent choice, offering excellent ABS and traction-control responsiveness and a stable viscosity over a wide temperature range.
Additional Maintenance and Care
To keep your RAM 1500 in peak condition, regular maintenance of air filters and fuel systems is essential. The WIX Air Filter (42725) features premium media for improved filtration. For fuel system health, AMSOIL P.i.® Performance Improver can restore up to 14% horsepower and clean GDI fuel injectors. When preparing the vehicle for seasonal storage, products like AMSOIL Gasoline Stabilizer help keep fuel fresh, while AMSOIL Engine Fogging Oil protects internal components from rust during long periods of inactivity.
About the Vehicle
The 2008 Dodge RAM 1500 Pickup represents a robust era in American truck manufacturing, built on a platform that balances rugged utility with modern comfort. Powered by the renowned 5.7L HEMI V8 engine, this vehicle delivers substantial torque and horsepower, making it a capable choice for everything from daily commuting to heavy-duty towing and hauling. The HEMI engine’s reputation for performance is well-deserved, and with its variable valve timing technology, it offers a good balance of power and efficiency for a truck of this size.
Owners of the 2008 RAM 1500 appreciate its versatile 4×4 capabilities, available with various transfer cases to suit different terrains. The truck’s interior space and towing capacity have made it a staple in both rural and suburban environments, serving as a reliable workhorse for contractors, farmers, and families alike. While the 2008 model year is part of the previous generation of RAM trucks, it retains a strong market presence due to its durability and the widespread availability of parts and service knowledge. Maintaining this vehicle with high-quality synthetic lubricants ensures it continues to meet the high demands of its owners, preserving its value and performance for years to come.