Just got this in from Blackstone. I intended to change at 5000 but had 3 straight weekends get filled up with other commitments. This is my 2nd oil analysis on this car (doing them once per year). The only thing that bugs me is the lead. All wear metals dropped per 1000 miles, but lead nearly tripled! Yet everything else is just about perfect...silicon is nicely dropped, flashpoint and fuel% are great, etc. Blackstone thinks it's an anomaly, that perhaps a particle streak went through the bearings and caused this. Does that sound feasible? The most current results are on the right. BTW, both of these analyses are with SL Pennzoil 5W/20.
Where'd all the calcium go?
TBN was reported at 1.9, so it looks like I'm at the oil's limit at 6000 mi. The previous sample had a TBN of 3.3 with 5100 mi.
Driving style has remained consistent between the two samples...90% highway miles with a weekly commute of 300 miles (roughly 30 miles to and from work each day).
Filter in the first analysis at 10K miles was a PureOne 14459. The most recent was a Premium Plus 24458.
As always, all comments appreciated.
Where'd all the calcium go?
TBN was reported at 1.9, so it looks like I'm at the oil's limit at 6000 mi. The previous sample had a TBN of 3.3 with 5100 mi.
Driving style has remained consistent between the two samples...90% highway miles with a weekly commute of 300 miles (roughly 30 miles to and from work each day).
Filter in the first analysis at 10K miles was a PureOne 14459. The most recent was a Premium Plus 24458.
As always, all comments appreciated.
