Mileage and time interval since the prior change are correct at around 1,800 miles and 20 months. The prior oil change interval was approx 1,600 miles, not 52,000 shown.
I tried to make as few short trips as possible, but there were quite a few 15-20 mile roundtrips.
The only thing that struck me was the high magnesium level from the prior analysis (04-Mar-2021) dropped down to what I had seen in earlier Blackstone analyses. That Mar 2021 analysis was from oil bought around 2016 or 2017. Maybe Castrol changed something in that time period? Maybe just a fluke analysis from the lab?
I tried to make as few short trips as possible, but there were quite a few 15-20 mile roundtrips.
The only thing that struck me was the high magnesium level from the prior analysis (04-Mar-2021) dropped down to what I had seen in earlier Blackstone analyses. That Mar 2021 analysis was from oil bought around 2016 or 2017. Maybe Castrol changed something in that time period? Maybe just a fluke analysis from the lab?
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