Ford approvals
Ford WSS-M2C specifications for engine oils: what the numbers and letters mean and which codes replaced the old ones.
- Ford WSS-M2C913-D, 948-B, 950-A: how do you read Ford approvals? What the Ford WSS-M2C codes on the can mean: how 913-D differs from 948-B and 950-A, what the suffix is for, and why a European code will not stand in for an American one.