Oil Cooler Radiators

A radiator cools engine coolant using airflow from the fan and driving; an oil cooler uses a separate heat exchanger to cool engine or transmission oil directly. Many SPELAB oil cooler kits are auxiliary units mounted in front of the radiator to add supplemental cooling capacity. For the 6.0L and 6.4L Powerstroke—trucks known for heat issues—an auxiliary oil cooler can drop oil temps by 10–25°F under load, making it one of the most impactful upgrades for towing.

Possibly. If your truck overheats due to a clogged, leaking, or physically damaged radiator, a direct-fit aftermarket replacement resolves it. However, overheating during towing can also stem from a failing water pump, thermostat, EGR cooler leak (common on 6.0L Powerstroke), or insufficient fan airflow. Diagnose the root cause first—if the radiator itself is fine, an upgraded radiator with more cooling rows will only help marginally.

Even without heavy towing, an auxiliary oil cooler benefits any turbo diesel driven aggressively, in hot climates, or for sustained highway speeds. High oil temperatures accelerate oil degradation and wear engine internals faster. Keeping oil 15–25°F cooler extends oil life and reduces engine wear. If your truck sits mostly at idle or does light city driving, the stock cooler is likely sufficient—but an oil temp gauge helps you make that call objectively.

Radiator replacement is straightforward for most mechanics—2–4 hours with basic tools, drain coolant first, disconnect fans and hoses, bolt in the new unit. Oil cooler kit installation is more involved: routing lines to the auxiliary cooler, tapping into the oil system, and bleeding air from the oil passages. Some kits require cutting and splicing into existing oil cooler lines. Budget 3–6 hours or plan for professional installation if you're not comfortable with line-flaring and routing work.

Yes, and this is a common high-performance combo. Stack an auxiliary engine oil cooler in front of the existing radiator-mounted transmission cooler—this sequence works because engine oil operates at higher temperatures than transmission fluid. Both can run simultaneously without interfering. For trucks doing extreme towing or performance tuning, this dual-cooler setup is one of the most reliable ways to protect both powertrains from heat damage under sustained load.