Hello fellow Mustang owners. Amsoil finally decided enough Ford vehicles were on the streets and track to formulate a Signature Series lubricant that meets API SN and Ford WSS-M2C931-C requirements. This is a big deal for those who are worried about not having Ford's recommended SAE lubricant in their Mustang.
Amsoil Signature Series 5W-50
This is the only known lubricant to carry Ford's recommendation code other than Motorcraft 5W-50.
APPLICATIONS
AMSOIL Signature Series Synthetic Motor Oil is excellent for use in all types of gasoline-fueled vehicles. It is recommended for all domestic and foreign vehicles requiring any of the listed performance specifications:
5W-50 (AMR): API SN, SM...; Ford WSS-M2C931-C (Mustang)
This also means Amsoil's Warranty will now cover your Condor, Roadrunner, Trinity, or Coyote engine that is spec'd for 5W-50.
I will edit my recommendation for the Boss 302, Track Pack GT, and GT500 vehicles used on closed course tracks and for those who do not want anything else in their Mustang except 5W-50.
Preferred Customers can purchase this formulation for $8.15 per quart or $92.85 per case (12 quarts). Amsoil's EaO11 oil filter is recommended for your application.
Looks like we have another new lubricant to test in the GT500 UOA Thread. With Amsoil's desire to produce only the best formulation possible, I'd assume it's more shear resistant than Motorcraft 5W-50. However, only time and testing will tell.
Amsoil Signature Series 5W-50
This is the only known lubricant to carry Ford's recommendation code other than Motorcraft 5W-50.
APPLICATIONS
AMSOIL Signature Series Synthetic Motor Oil is excellent for use in all types of gasoline-fueled vehicles. It is recommended for all domestic and foreign vehicles requiring any of the listed performance specifications:
5W-50 (AMR): API SN, SM...; Ford WSS-M2C931-C (Mustang)
This also means Amsoil's Warranty will now cover your Condor, Roadrunner, Trinity, or Coyote engine that is spec'd for 5W-50.
I will edit my recommendation for the Boss 302, Track Pack GT, and GT500 vehicles used on closed course tracks and for those who do not want anything else in their Mustang except 5W-50.
Preferred Customers can purchase this formulation for $8.15 per quart or $92.85 per case (12 quarts). Amsoil's EaO11 oil filter is recommended for your application.
Looks like we have another new lubricant to test in the GT500 UOA Thread. With Amsoil's desire to produce only the best formulation possible, I'd assume it's more shear resistant than Motorcraft 5W-50. However, only time and testing will tell.
Last edited:
