Originally Posted By: btanchors
Itslimjim,
The spec sheet from Mobil 1 lists the TBN at only 8.8, so Blackstone is within 10%. Incidentally, your comment made me go to the Mobil 1 website, to look at the 0W-20 spec sheet. I noticed that it has been very recently updated, to include the SN specification. Most of the specs have changed slightly. See the spec sheet
here . The Viscosity Index even increased slightly (I am sure CATERHAM will take note, although still not in the same league as the Toyota oil
)
I can accept that a possible reason for moving from Calcium to Magnesium might be cost. Can someone explain why this new approach Mobil 1 is taking might not be as good as the traditional approach with more calcium?
Makes me wonder if this oil can go up to 10K in my 5.7L Tundra. Perhaps it is time to consider switching to Amsoil or RedLine?
From what I've read, magnesium tends to allow for more deposits and was higher in older API spec(like SJ or SL?)...not sure. Calcium is non-the-less typically regarded as more effective for longer intervals, compared to magnesium. Someone else can correct me on that. I'm still learning.
Thanks for the updated spec and the mention of TBN. I forgot we are looking at AFE, not EP.
Probably still fine to run in a Honda Fit for 7,500 and sending in a sample for fun, or if concerned about SN vs SM now for extended OCI regarding M1 AFE 0w-20. It could be I'm used to seeing a little diff. in a 0w-30 as well, FWIW.
Thanks for getting the sample, btw.