Originally Posted By: modularv8
Originally Posted By: Indydriver
If I'm reading the article correctly, they are recommending an OCI of 20,000 km (12,427 miles) in a DI turbo that will require it's scrawny little neck to be rung out with every shift to find any power. I wonder if they care about fuel %, FP fallback and viscosity dilution like I get in my Mazdaspeed. Maybe we are WAY too conservative here.
You are correct. Do these engines use DAMB actuated valve-trains? Long term durability of DI engine valve-train components is important to Ford.
I have read SAE paper 2006-01-1099, a study by Ford Motor Co. (2006)
"Characterization of Anti-Wear Films Formed from Fresh and Aged Engine Oils"
Conclusion: They found aged oil has significantly greater antiwear and lower friction properties than fresh oil.
Perhaps the results of this study, higher quality motor oil specification, and Ford's engine designs promote the long drain interval.
Originally Posted By: Jim Allen
Thanks for reminding me of that study, modular! I was just discussing it with someone but couldn't name the source. IIRC, new oil "washes" the existing anti-wear additives off the surfaces and it takes a bit of time for them to build back up, so after your oil change, there is a period of increased wear. Another black mark against the overly-frequent oil change.... the wastefulness of which is often dismissed by the statement," Oh but my engine LOVES it."
Modular & Jim:
If true, that's a real revelation for an old dog like me who's been changing oil in motorcycles and cars for over 40 years. Assuming you agree with the finding of this study, how does it impact your personal practices in maintaining your vehicles? I see this then read a thread about engine sludge where you come away wanting to go back to the old 3000 miles days.