Background:
Just bought a 2001 7.3 PSD. Ford's spec was CG-4/SH for that engine.
I'm working on understanding if anything/what may have been compromised (additive deletion?) with the migration to CI/CJ, but for the moment. let's assume that I want to use an oil that is explicitly rated CG-4. (Not looking to recycle (pun intended) any oil wars here.... I get that using most any decent oil at the regular service intervals is 95% of the battle).
Canuck boy here, so I want to run synthetic for the low temperature performance, so will use 5W40.
Q) Has anyone recently queried Shell or Mobil concerning the CG-4 certification on these products ?
Mobil's site lists TDTruck 5W40 as being CG-4, while Shell's site does not list CG-4 for their T6. Fast forward through 3 shopping trips (my wife deserves a medal for patience on this)....... I found the opposite to be true - Mobil does NOT list CG-4 on the TDTruck jugs at Wmart, but the T6 I ended up buying at CTC DOES list CG-4 explicitly on the jug.
Supply chain delays could explain the Mobil story, but not so much for Shell....
??? D.
Just bought a 2001 7.3 PSD. Ford's spec was CG-4/SH for that engine.
I'm working on understanding if anything/what may have been compromised (additive deletion?) with the migration to CI/CJ, but for the moment. let's assume that I want to use an oil that is explicitly rated CG-4. (Not looking to recycle (pun intended) any oil wars here.... I get that using most any decent oil at the regular service intervals is 95% of the battle).
Canuck boy here, so I want to run synthetic for the low temperature performance, so will use 5W40.
Q) Has anyone recently queried Shell or Mobil concerning the CG-4 certification on these products ?
Mobil's site lists TDTruck 5W40 as being CG-4, while Shell's site does not list CG-4 for their T6. Fast forward through 3 shopping trips (my wife deserves a medal for patience on this)....... I found the opposite to be true - Mobil does NOT list CG-4 on the TDTruck jugs at Wmart, but the T6 I ended up buying at CTC DOES list CG-4 explicitly on the jug.
Supply chain delays could explain the Mobil story, but not so much for Shell....
??? D.