I use regular Rotella. My logic is the synthetic is wasted in a diesel that I will never wear out. I don't know what my engine saw for the first 90k miles, so the impact of oil type is irrevelant to my comment. When I pulled the head at 110k to replace a liner, the cylinder walls still had the cross hatching.
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Richard Rhonda Ty and Alex Entrekin
1995 Newell # 390 DD Series 60, Allison World Trans
Subaru Outback toad
CoMotion Tandem
Often wrong, but seldom in doubt
Rhonda's chronicle https://wersquared.wordpress.com/
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