"Together, both companies rigorously tested and refined a bespoke engine oil blend, leading to the launch of Castrol EDGE SUPERCAR 5W-50 -
recommended for the Ford GT."
"Bespoke" is another way of saying this oil is made under contract for Ford.
Edge Supercar 5W-50
- Approved for use in vehicles where the manufacturer requires a product that Meets Ford WSS-M2C931-C. It has been exclusively developed for the FORD GT supercar and is also suitable for use in other performance cars.
- Suitable for use in vehicles where the manufacturer recommends an API SN 5W-50 lubricant.
Other oil meeting Ford Spec WSS-M2C931-C:
- Amsoil Signature Series 5W-50
- LUCAS OIL High Performance 5W-50
- Motorcraft® SAE 5W-50 Full Synthetic Motor Oil (yes, the same oil recommended for 05-06 GTs)
View attachment 56392
From the
Ford Motorcraft Oil Data Sheet V4.5, 7/2016 (same in V9.0, 2018):
View attachment 56393
But, of course, paranoia strikes deep. Hmmm. There must be something really special to make oil cost $25/qt. Yeah, that $8/qt oil must be crap. My engine is like no other.