For markets a particular motor oil for use in the Shelby GT500 and Ford GT models....it is a 5w-50 Full Synthetic
It now carries the "WSS-M2C931-B" specification....
The old spec for this oil was "WSS-M2C931-A" and was also an API "SL" rated oil...
The newer "B" Spec oil is an API "SM" rated...
