Ovde se sva tehnologija ulja svela samo na puku gradaciju. Toliko o poznavanju.
I uopšte nije tačno da je Ford propisao 5W-30 kao isključivo gradaciju (za sve motore svuda).
Što se C-Maxa sa 2.0 TDCi motorom tiče, fabrika kaže ovo:
Doduše, ovu informaciju sam morao da platim milion maraka.Engine oil: Castrol Engine Oil WSS-M2C913-C
Providing it meets the specification defined by WSS-M2C913-C, you can also use Ford Engine Oil or an alternative engine oil.
Topping up the oil: If you are unable to find an oil that meets the specification defined by WSS-M2C913-C, you must use SAE 5W-30 (preferred), SAE 5W-40 (except vehicles with E85 fuel) or SAE 10W-40 that meets the specification defined by either ACEA A5/B5 (preferred) or ACEA A3/B3.