It's important to note that OCI is also based on driving style intervals - highway miles, short tripperss with alot of cold starts and engine not coming to temp, daily driver, etc.

For me, which also references based on UOA's around 7K is the limit per OCI. It's a daily driver and does get some slight fuel dilution. I change my oil whenever I swap tires - summer/winter which generally works out to be around 7/5K.