Description of the design of the engine lubrication system

The one who lubricates well, drives well. Although Focus engines are not considered to consume a lot of oil, i.e. are «oil eaters», However, we recommend that you check the oil level at least after every second refueling. As long as the oil level is between the marks «MIN» And «MAX» on the dipstick, there is no reason to add oil. The difference between the two marks varies depending on the engine model from 0.5 to 1 liter. Never fill oil above the mark «MAX»: This can adversely affect the crankshaft radial seals and the air filter.

Without adequate lubrication, the engines would seize up in just a few minutes. Therefore, the thinnest oil film protects against destructive friction wherever moving parts in the engine come into contact with each other: for example, on pistons and piston pins, on cylinder sliding surfaces, connecting rod bearings and crankshaft main bearings or in the entire valve train.

In order for the lubrication film «didn't stop», while the engine is running, oil circulates through a filigree labyrinth of tubes, channels and holes. The controlled circulation is provided by the oil pump, it sucks the engine oil directly from the crankcase and accelerates it inside the labyrinth described in the direction of the desired address. And in order for the oil to flow there as much as possible «fresh», it also first passes through the oil filter, which in the Focus is located almost immediately after the oil pump directly in the main flow of the circulating oil. The oil filter separates soot particles, metal abrasion products and other foreign particles from the lubricant. It cleans until its microscopically thin paper sheets remain permeable and free from contamination.