Interesting, thanks for sharing. Your Mobil 1 Delvac ESP 0w40 UOA vis avg. is 12.6 cSt @ 100C. Lower SAE limit for 40 wt is 12.5 cSt @ 100C (according to SAE website).
New oil avg. per Mobil PDS is 14.6 cSt. So there is some shear down and / or volatility over your 7,503 avg. OCI, but only down to the high limit of an SAE 30. Since these aren't HEUI injectors, no concerns with pilot valves stiction. Likely not huge deposits in piston ring / lands either.
I concur with racin4ds - being "way south" of you in mid-Minnesota, we're running synthetic 5W-40. Shell Rotella T6 CK-4.
Mobil Delvac 1 ESP 5W-40 is not approved against Ford antiwear spec WSS-M2C171-F1. I don't know why not. 0W-40 is approved. Rotella T6 CK-4 is approved.
WSS-M2C171-F1 originally developed to protect older HEUI PowerStrokes from modern CK-4 oils that took out too much antiwear to protect new diesel exhaust catalysts.
New oil avg. per Mobil PDS is 14.6 cSt. So there is some shear down and / or volatility over your 7,503 avg. OCI, but only down to the high limit of an SAE 30. Since these aren't HEUI injectors, no concerns with pilot valves stiction. Likely not huge deposits in piston ring / lands either.
I concur with racin4ds - being "way south" of you in mid-Minnesota, we're running synthetic 5W-40. Shell Rotella T6 CK-4.
Mobil Delvac 1 ESP 5W-40 is not approved against Ford antiwear spec WSS-M2C171-F1. I don't know why not. 0W-40 is approved. Rotella T6 CK-4 is approved.
WSS-M2C171-F1 originally developed to protect older HEUI PowerStrokes from modern CK-4 oils that took out too much antiwear to protect new diesel exhaust catalysts.