Originally Posted By: Artem
TBN almost seems unnatural after 5k miles of use.
At the rate of decline, this oil is good for 25,000 miles. Hahahaha.
I thought it was high, so I started looking for info on what it started at, as far as I could find 0W-40 EF starts at 12.6 TBN. Then a measure of 8 didn't seem that high for 5100 miles and suggested 15000 mile life span.