Selecting the correct motor oil for your 2018 Dodge Durango RT is fundamental to ensuring the longevity and performance of its robust 6.4-liter Hemi V8 engine. This specific powertrain demands a precise formulation to handle the substantial power output and maintain optimal operating temperatures, especially during towing or spirited driving. The wrong viscosity or quality level can lead to increased friction, reduced fuel economy, and potentially severe internal wear over time.
Understanding API Service Standards and Viscosity
When searching for 2018 Durango RT oil type specifications, the first criteria to consider are the API service ratings and the viscosity grade. Modern engines require oils that meet the GF-6 standard, which provides enhanced protection against low-speed pre-ignition (LSPI) and improves fuel efficiency. For the 6.4L Hemi, the recommended viscosity is typically 5W-20, a multi-grade oil engineered to flow quickly at cold startup to protect critical components while maintaining a stable film thickness at high operating temperatures.
Synthetic vs. Conventional Blends
While the factory fill might be a full synthetic, owners often wonder about the cost-benefit differences. For the Durango RT, sticking with a synthetic blend or a full synthetic is generally the superior choice. These formulations offer superior oxidation resistance, better viscosity stability in extreme heat, and enhanced turbocharged engine protection if modifications are made. Conventional mineral oils break down faster under the thermal stress generated by the Hemi’s high compression ratios, making them a riskier long-term investment.
Performance Additives and Detergent Packages
Beyond the base oil, the additive package is what truly defines the protection level for your 2018 Durango RT. High-quality detergents are essential to manage the soot and byproducts produced by the 6.4L engine, preventing sludge buildup in the oil pan and maintaining clean valve train components. Look for oils labeled as possessing superior Total Base Number (TBN) ratings to ensure the oil remains alkaline and effective in neutralizing acidic combustion byproducts over extended drain intervals.
OEM Specifications and Warranty Considerations
To avoid voiding the powertrain warranty or ensuring peak performance from the factory, adhering to the Original Equipment Manufacturer (OEM) specifications is critical. For the 2018 Durango RT, this means confirming that the oil bottle meets the standards set forth by Chrysler, specifically MS-11106. This certification ensures the oil has passed rigorous shear stability and fuel economy tests, guaranteeing compatibility with the variable valve timing (VCT) system present in the Hemi engine.
Oil Capacity and Change Intervals
Understanding the physical limits of your vehicle is just as important as the chemical composition of the oil. The 2018 Dodge Durango RT has a substantial oil capacity, generally requiring around 6 to 7 quarts for a complete fill, including the filter. Regarding the 2018 dodge durango rt oil type and change frequency, modern synthetic oils allow for extended intervals; however, following the severe service schedule is recommended if the vehicle is used for towing or stop-and-go traffic, typically capping intervals at 7,500 to 10,000 miles.
