M1 0w40 FS oci vs M1 AP?

[Doublehaul]

Is the 0w40fs better suited to long drains than say M1 annual protection? It's got a huge starting tbn...more so than any of the low saps oils...just curious to everyone's thoughts.

I'm running it at 10k in both my Toyota's plus all my ope

 

[RooflessVW]

M1 FS 0W-40 is better suited to long drains in the applications that call for it.

There is no specification or application crossover between FS and any grade of AP.

 

[WhizkidTN]

In my '12 Optima 2.0T engine, it would shear down fairly quickly and oxidize far too fast (~4K mile OCI). That was with 93 octane Top Tier gas as well. I had over 5% fuel dilution according to the Polaris UOA. So I switched to Castrol Edge 0W-40 and with the same OCI of ~4K miles, the oil held up much better (no shearing and no oxidation). Metals and other items all looked ok on both.

 

[buster]

These oils use different chemistry to achieve desired performance characteristics. AP is a more "modern" approach better suited for GDI engines. The 0w40 ESP is more similar to AP than FS due to the lower SA level.

 

[Doublehaul]

If both oils were used in the same port injection gas engine...say in a pick up or sedan which would be more capable of extending an oci. Simple enough?

I understand the differences in makeup and chemistry

 

[Bryanccfshr]

While TBN isn't everything the Porsche cert is a lot more than not having it.
They have reduced their ocis to 10k since they went DI but their older port models are still 20k.

While not a POrsche the 1gr Fe will probably be capable of some longer ocis with the mobil1 0w40 than with the annual protection based upon a combination of the certification and the TBN. Not based upon a label. I don't have the patience to test the limits of each oil and by the time you do so the oils tested will have been updated.