The correct transmission oil is important for performance and longevity
Focus gearboxes use synthetic multi-purpose oils. In case you have to add oil after a repair, for example after replacing the drive shaft, be sure to stick to the same quality oil. The first address is your Focus dealer, he has the appropriate oils in stock. Without professional equipment, filling the viscous transmission oil requires a lot of patience from the amateur: workshops work with booster pumps that fill the oil directly into the gearbox from 50-liter barrels. Although you can pour small amounts with an oiler with a syringe and an extension hose. In the iB5 gearbox, the oil level should be about 10-15 mm below the edge of the filler hole, the correct measure for the MTX-75 gearbox is at least 5 mm below the filler hole. In automatic gearboxes, there is no room for interpretation: you check the oil level with the engine running with a dipstick at the height of the front wall under the hood (on the left in the direction of travel).