Re: OWNER: Ertech
Klink, thanks for the tip! I didnt realize M-1 had reduced the ZDDP levels in the 10W-40 formula, by 200ppm each, sometime in the past 2 years. Current Mobil spec sheet (Feb-2018) PDF attached plus screen shots. Older spec sheets available
here. The M-1 15W-50 still retains politically incorrect levels of ZDDP, as does M-1 0W-40 FS (not to be confused with M-1 0W-40 ESP, or any other version of 0W-40). Remeber, all the Mobil-1 products in xW-40 or xW-50 viscosity are Group III synthetics, which is why they are cheap. If you change at 3k-5kmi, they are fine.
Red Line 10W-40 still has ZDDP levels in the 1000-1200 range based on multiple UOAs from my engines over the past few years, plus they use moly and some Group V (ester) base stocks, which makes me feel warm and fuzzy inside. Available at Jegs or Summit Racing for ~$48/gallon, free shipping over $99.
FWIW: The Mercedes dealer 5W-40 oil specd for the AMG M156 engine (with similar valvetrain design as the M119) has relatively low ZDDP levels, ~800 P, ~1000 Zn (based on UOA). The M119 valvetrain doesnt really need a super high ZDDP levels like the M117, but I still dont like low-ZDDP emissions-friendly oils.