I've been looking around for info about the Delo 400 LE 15W40 vs. the new(er) Delo 400 SDE. It looks like no one sells Delo 400 LE 15W40 anymore. I think that Delo is selling a 400 LE 5W30 synthetic.

Using the Chevron spec sheets, the zinc concentration in the LE is 0.13% by mass and in the SDE it's 0.08% by mass. The phosphorous concentration in the LE is 12% by mass and in the SDE it's 0.08% by mass. I can't find a similar spec for a Delvac 1300 and not sure which Shell Rotella to consider.

Evidently the ZDDP concentrations in a typical 15W40 are now all below 800 ppm.

Any body aware of a dino 15W40 that is on the market and still has the higher ZDDP concentrations?

https://go.chevronlubricants.com/rs/494-SKC-981/images/LL-Chevron-Response-to-Ford-Motor-Company-CK-4-Position-Statement.pdf?mkt_tok=eyJpIjoiWldJNVl6VXhZV013TWpRMyIsInQiOiJ3NllwTU9OUkFJY3dSek9rVnZOeENBSFJDSWdqT2 1ab0pJVTRKNTc3R0JJaEJrbWVSbWVNcXFsTjdyRGFTOEpad3QyY1Q0MlwvTEZTVkRCOWZqVGlna0xwRjJDY2QwRlpwOUIyS2ZVSW UydUk9In0%3D

Thanks,

__________________
- Neil
'83 W123 (Ol' Yeller)
'82 HP 34C