I own a 2012 Honda Accord 2.4L. 248k miles One thing I've noticed, and running either M1 euro 5/40 or Castrol euro 5/40 it's entire life, at 5k miles, it's 1k qt low, at 3k miles, it's full. So somewhere between the 3k and 5k it uses 1qt. I change it at 5k miles. I feel this is the point where the add packs to the oil is starting to break down. I change the oil now at the 5k mark.
I did long haul trucking from 1999-2002. The company I was working for did 30k oci. At 10k miles on the oil, it was down a gal every 5k after. Of course lots of idle time and hwy miles.
Seems to me, once you reach that miles on a good engine, if the oil is down regardless of what the lab says in regards to the TBN, that should be your OCI time. Oil and a filter is cheap if dyi
I did long haul trucking from 1999-2002. The company I was working for did 30k oci. At 10k miles on the oil, it was down a gal every 5k after. Of course lots of idle time and hwy miles.
Seems to me, once you reach that miles on a good engine, if the oil is down regardless of what the lab says in regards to the TBN, that should be your OCI time. Oil and a filter is cheap if dyi