I thought I saw this somewhere so essentially phos levels are irrelevant with a higher zddp for lspi if I’m reading that correct. Where does calcium play into that?
0-40w/5-40w 2019 WRX
- Thread starter Levif
- Start date
OVERKILL
$100 Site Donor 2021
Calcium instigates LSPI, this is why we see lower levels of calcium in the API SP oils, including M1 0W-40.
Right but if you had high zddp would it quench it? Wouldnt a low cal, high zddp be the best for lspi? They all seem on the lower side I guess to stay in phos limits Also isn’t it mostly driving conditions anyway? Low load high demand
What HPL oil would you suggest?
OVERKILL
$100 Site Donor 2021
I mean, if you are already at zero LSPI events, adding more ZDDP isn't going to improve that further. That said, there are other advantages to higher levels of phosphorous, such as AW performance.
OVERKILL
$100 Site Donor 2021
Something from their PCMO series, like the 5W-40:
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