High-Performance & Sports Cars: Generate more heat due to high-revving engines and aggressive driving.
Heavy-Duty Vehicles: Diesel trucks, tractors, and construction equipment work under constant heavy load.
Turbocharged/Supercharged Engines: Turbos get extremely hot and are often lubricated and cooled by engine oil, putting extra heat into the oil system.
Motorcycles: Especially sport bikes and adventure touring bikes, where the engine is working hard and has less mass to dissipate heat.
Transmissions & Differentials: Automatic transmissions have their own oil (transmission fluid) which is often cooled by a separate transmission oil cooler. The same applies to the differential in some performance vehicles.
