What are the lubrication methods for an engine?

[VanSkylar]

There are three lubrication methods for an engine: pressure lubrication, splash lubrication, and gravity lubrication. Pressure lubrication involves using an oil pump to forcibly deliver lubricating oil to various friction surfaces. This method is generally used for parts that experience significant force and relatively high movement speeds during operation. The lubrication intensity for engine components depends on their environment, relative movement speed, mechanical load, and thermal load. For periodic lubrication, grease is periodically applied to less critical and scattered parts, such as the engine water pump bearings, generator, starter, distributor, and other assemblies. This method can be used for such components.

[LaGraham]

I've been repairing cars for over a decade, and engine lubrication methods are quite crucial. There are three common types: pressure lubrication, splash lubrication, and oil bath lubrication. Pressure lubrication is the most commonly used, relying on an oil pump to deliver oil under pressure to places like the crankshaft, connecting rods, and camshaft, ensuring smooth operation without friction. Splash lubrication occurs when the engine rotates, splashing oil to lubricate the piston skirts and cylinder walls, suitable for some older or simpler designed engines. Oil bath lubrication mainly involves immersion in an oil reservoir, commonly used in gearboxes. Regular oil changes are a key maintenance point, as oil contamination can clog the system and reduce efficiency. Different vehicle types may have minor variations, such as diesel engines requiring higher pressure. Remember, low oil levels or inappropriate viscosity can cause wear; checking the dipstick monthly can save a lot of trouble.

[VonNorah]

Having driven long distances for many years, I've got a thorough understanding of engine lubrication, which mainly involves two methods: pressure feeding and splash lubrication. The pressure feeding method uses an oil pump to deliver oil to lubricate key components, and most modern cars operate this way. It's why the engine hums smoothly at high speeds without major issues. Splash lubrication relies on the engine's internal motion to fling oil around, and my old Jeep saves on repairs thanks to this. Don't slack on checking the dipstick—keeping the oil clean and at the right viscosity is crucial. Insufficient lubrication can cause piston scuffing, overheating, and smoke, leading to major repairs if severe. Experience tells me that using thinner oil in winter and thicker oil in summer provides better lubrication and protects engine longevity. Many roadside breakdowns stem from lubrication mistakes—a small oversight can turn into a big problem.

[StNora]

Having been in the car community for less than a year, I've learned that engine lubrication relies on pressure and splash methods. Pressure lubrication uses an oil pump to forcibly deliver oil to bearing areas, ensuring oil film coverage to prevent wear. Splash lubrication occurs when the crankshaft rotation splashes oil to lubricate surrounding components, which is simple and cost-effective. When driving, it's important to monitor oil level and color, changing it when it's dirty or black. Insufficient lubrication often causes noise or overheating issues, and maintenance shops will remind you to check during service. Different car models may have slightly varying designs, but the principle remains the same to ensure safety.