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I have a new engine rebuild that my engine builder used Rotella T 30W (plus I added a bottle of ZDDP) for engine breakin...primarily to break in the cam. Well after 500 miles the rings never seated and has major blowby. Getting ready to do an engine diagnosis (leak down test, compression test)...

I have been comparing HDEO of Valvoline all fleet, Chevron Delo and Rotella T (single weights) and have had sucess of finding good techincal product data sheets for Valvoline and Chevron, however it seems like Shell is no longer making this info public. I have had no sucess in contacting them...

Attempting to do some research on who possibly manufactures Super Tech brand Oil (Walmart) and I have heard that "Warren" does, however there are (2) companies both I think just package and distribute oil for other companies ? Warren Oil Warren Distribution

From the Warren website their HD30 is listed as a PCMO : Warren 30HD Passenger Car Single Grade Motor Oil (PCMO) is formulated to provide engine protection under severe operating conditions. Made from selected and highly refined base oils compounded to provide protection against wear and...

I have a SBC 383 recent rebuild with ~300 miles on it with flat tappet cam, 10.5:1 compression, Holley 750cfm etc. The cam was broken in with Rotella 30W and a bottle of ZDDP additive for extra protection. I am running a 7 qt oil pan, HV oil pump and a larger "truck" filter that fits this SBC...

I have been trying to find out the concentrations of Zinc and Phosphorus (specifically interested in ZDDP levels) for Shell Rotella T diesel single weight oils (primarily 30W) which currently is API CF-4. There is some info out there saying that the 15W40 mutiweight oil has 1200 ppm Zinc and...