OilPan 4,
That's what the literature for the Aura series says (-22F/-30C). The Senville Leto series goes down to 5F. Sounds like that might be what you have.
AC_Hacker
The HSPF4 is 10.2 for the one I'm looking at. Its not 12 but seems ok. That's why I am posting to see if I am missing something before I dive in.
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