I've been running Delo 400 (same
oil I run in my F350 PSD) because of the added
zinc (
zinc dithiophosphate or ZDDP ) in current FE build since break-in which now has 3Kmiles.
From ad for ZDDP Plus
Oil Additive:
After 70+ years, the EPA mandated that all domestic
oil producers remove ZDDP (
Zinc Dialkyl Dithio Phosphate) from all conventional and
synthetic motor oil. If your engine was designed before 1989 the non-roller lifters require ZDDP to avoid premature deterioration. ZDDP also alters bearing and journal surface characteristics to prevent metal to metal contact. Under extreme conditions like a high performance motor, ZDDP reduces the tendency of parts to scuff or gall under heavy loads.
I haven't used this additive but I did go with Delo because of the added ZDDP and the protection it provides. I have since found that "newer" Delo 400 LE (Low Emissions) does not provide ZDDP at the same levels as the older version of Delo. I am going to do further investigation on ZDDP additives.
Thanks for the post.
Mike