Tolerance can be described as an individual automaker's own standard, developed for a specific engine or engine line. It includes all the requirements that an oil must meet in order to be optimally suited for a particular engine. The list of these requirements is much wider than in generally accepted standards (see above). This is due to the fact that many of the manufacturer's developments applied in the motor and affecting the requirements for oil are still too specific and cannot be included in the general rules (and some cannot be taken into account also because they are classified information) . Many famous car brands have their approvals (
BMW,
Fiat,
Ford,
MAN,
Mercedes-Benz,
Opel,
Renault,
Peugeot and Citroen,
Volvo and
VW concern); to obtain approval, each brand of oil undergoes very rigorous tests, and only after them does it receive the right to indicate information on compliance on the packaging.
This information, of course, is not necessarily indicated for all car models. However, if the tolerance data is in the official specifications of your car, the search for the right brand of oil is gr
...eatly simplified — the compliance of the oil with this tolerance automatically guarantees optimal compatibility with the car. In other words, instead of specifying a whole set of parameters (appointment, viscosity, etc.), it will be enough to make sure that there is a tolerance.Engine oil quality standard that Ford considers mandatory for correct operation when used in the engine of their cars:
ESN-M2C159-B,
WSS-M2C134-D,
WSS-M2C153-C,
WSS-M2C159-B,
WSS-M2C159-C,
WSS-M2C171-E,
WSS-M2C171-F1,
WSS-M2C171-D,
WSS-M2C912-A1,
WSS-M2C913-A,
WSS-M2C913-B,
WSS-M2C913-C,
WSS-M2C913-D,
WSS- M2C917-A,
WSS-M2C920-A,
WSS-M2C925-A,
WSS-M2C925-B,
WSS-M2C929-A,
WSS-M2C930-A,
WSS-M2C934-A,
WSS-M2C934-B,
WSS-M2C937-,
WSS-M2C944-A , WSS-M2C945-A,
WSS-M2C945-B,
WSS-M2C946-A,
WSS-M2C946-B1,
WSS-M2C947-A,
WSS-M2C947-B1,
WSS-M2C948-B,
WSS-M2C950-A and
WSS-M2C961-A1.
