Quote:
Originally Posted by kilodawg
You can find the info that MichaelN quotes if you go to the Mobil 1 site and do a search on ZDDP. It's there just as he states...
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Please provide the link as I am not clever enough to find it.
I will point out that certian documents provided by a manufacturer have more "weight" (i.e. are vetted as accurate) than others. Product data sheets are typically used to present highly vetted data and the omission of Zn and P data is suspicious after all, it it is in the product, why not announce it proudly.
Also, if I am not mistaken the SM rules allow some weights of SM oil to be at or above the 1000 ppm (1%) level. However, being allowed to do it and actually doing it are two separate topics.
ZDDP is an expensive additive, if they can cheapen the product by not using as much, there is a very strong temptation to do so. Once agian, since it is not published in the Tech data sheet, they have no duty to maintain any more than the minimum required by API.
Like I have said before, Mobil may have a fine product and they may have the levels I need at this time, but they are not willing to be forcoming on what levels they plan to maintain in the future. Add to this that, in the past, they lowered the levels with nary a word.
Not very trustworthy in my book.