4WD
$50 site donor 2024
I’m using the tail end of the “RGT blowout” jugs in my Jeep …The only thing that stands out at all to me is the oil seems more spent than it should at 3600 miles. I would expect Amsoil to have more TBN left at that mileage. And Boron is depleting
edit: sorry, I saw Amsoil on the report but you said it's Shell RGT. My bad.
Based on CarbonSteel’s runs in the Grinch - doing 5K only …
(TBN retention) …
Never did put any in my GDI engines …