I send in a sample every 10k to blackstone.
I Haven't drained in 35k, Just over 1 cup make up oil so far.
I do have a bypass filter though . . .
The key question are
1) what vehicle?
2) What oil?
3) What driver/ where?
Bob is the oil guy is THE reference for oil questions online.
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2012 Tesla Model S P85
2013 Nissan LEAF SV totaled by now deceased intoxacated driver.
2012 Nissan LEAF SV
6 speed ALH TDI Swapped in to a 2003 Jetta Wagon
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