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 oil....
Here is the rub...the new "B" Spec oil is required to maintain your new car warranty for the Shelby GT500....guess what the only brand on the planet you can get spec oil from is?
Motorcraft....! Average retail per qt. is around $10.00 + tax here in Seattle...
All other brands of oil that even offer a 5w-50 only meet the "A" Ford Spec, but are "SM" API rated....
I want to use PP, as that is what my shop stocks & sells....having to get this from a Dealer frankly chaps my hide.....
What I am really trying to figure out, is what is this "WSS-M2C931-B" Spec oil, and why is no other Company besides Motorcraft offering it?
I gotz' a funny feeling that the only difference may be the SL to SM API rating change.....
Help!
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 oil....
Here is the rub...the new "B" Spec oil is required to maintain your new car warranty for the Shelby GT500....guess what the only brand on the planet you can get spec oil from is?
Motorcraft....! Average retail per qt. is around $10.00 + tax here in Seattle...
All other brands of oil that even offer a 5w-50 only meet the "A" Ford Spec, but are "SM" API rated....
I want to use PP, as that is what my shop stocks & sells....having to get this from a Dealer frankly chaps my hide.....
What I am really trying to figure out, is what is this "WSS-M2C931-B" Spec oil, and why is no other Company besides Motorcraft offering it?
I gotz' a funny feeling that the only difference may be the SL to SM API rating change.....
Help!